Artykuły w czasopismach na temat „Carbon dioxyde (CO2)”
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Nousir, Saadia, Gerlainde Yemelong, Sameh Bouguedoura, Yoann M. Chabre, Tze Chieh Shiao, René Roy i Abdelkrim Azzouz. "Improved carbon dioxide storage over clay-supported perhydroxylated glucodendrimer". Canadian Journal of Chemistry 95, nr 9 (wrzesień 2017): 999–1007. http://dx.doi.org/10.1139/cjc-2017-0219.
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Low-cost biosourced hybrid microporous adsorbents with improved affinity towards carbon dioxyde (CO2) were prepared through the incorporation of various amounts of glucosylated dendrimer into bentonite- and montmorillonite-rich composite materials. Characterization by nitrogen adsorption–desorption isotherms, surface specific and pore size analyses (BET and BJH), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) revealed changes in the interlayer spacing and textural structure of the materials. Thermal programmed desorption measurements (TPD) showed significant improvements of the retention capacity of CO2 (CRC) and water (WRC). This was explained in terms of enhancement of both surface basicity and hydrophilic character due to the incorporation of terminal polyhydroxyl groups. The CRC was found to vary according to the previous saturation time with CO2 and the carrier gas throughput. CO2 was totally released upon temperature not exceeding 80 °C or even at room temperature upon strong carrier gas stream, thus providing evidence that CO2 capture involves almost exclusively physical interaction with the OH groups of the dendrimer. This result opens promising prospects for the reversible capture of carbon dioxide with easy release without thermal regeneration, more particularly when extending this concept to biosourced dendrimers.
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AROUNA, Ousséni, Issiaka SARE WARA, DJAOUGA Mama, ZAKARI Soufouyane i Ismaïla TOKO IMOROU. "Cartographie de la variabilité spatiale du stock de carbone forestier dans la Réserve de Biosphère Transfrontalière du W au Nord-Bénin." Journal of Geospatial Science and Technology 2, nr 1 (7.10.2021): 47–60. http://dx.doi.org/10.54222/afrigist/jgst/v2i1.4.
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La cartographie du stock de carbone permet d’enrichir les connaissances mais aussi la comparaison des diverses transformations du couvert végétal sur l’évolution du stock. La présente recherche vise à cartographier la variabilité spatiale du stock de carbone forestier dans la Réserve de Biosphère Transfrontalière du W au Nord-Bénin. Le modèle de régression non linéaire a permis de prédire la distribution spatiale de la biomasse et du carbone à partir des valeurs de NDVI. Il résulte de cette méthode que la biomasse totale produite dans les unités de végétation de la RBTW a été estimée à 39 988 935,73 tonnes. La quantité totale de carbone correspondante est de 19 474 611,70 tonnes. Concernant la quantité de dioxyde de carbone accumulée, elle a été évaluée à 71 471 824,94 tonnes. Par ailleurs, la quantité de biomasse estimée par placeau oscille entre 2,71 et 172,82 t/ha. Le potentiel de séquestration de carbone dans les savanes boisées et arborées fait respectivement 1,81 et 1,24 fois celui enregistré en moyenne dans la RBTW. Les savanes arbustives et les friches sont les unités qui piègent le moins de dioxyde de carbone soit 18 % et 2 % du total de CO2. Sur l’ensemble du secteur d’étude, la quantité de carbone enregistrée varie de 35,80 à 54,32 t/ha avec une moyenne de 41,24 ± 4,08 t/ha. La quantité moyenne dans le Parc est de 40,42 ± 2,85 t/ha alors qu’elle est de 41,95 ± 4,78 t/ha pour la périphérie. La distribution spatiale de la biomasse et du carbone montre que les fortes quantités de biomasse et de carbone sont enregistrées particulièrement au sud-ouest de la RBTW. Mapping of carbon stock allows for a better understanding but also for the comparison of various vegetation cover transformations on the evolution of the stock. The present research aims to map the spatial variability of forest carbon stock in the W Transboundary Biosphere Reserve in northern Benin. The non-linear regression model was used to predict the spatial distribution of biomass and carbon from NDVI. As a result of this method, the total biomass produced in the RBTW vegetation units was estimated to be 39,988,935.73 tons. The corresponding total amount of carbon is 19,474,611.70 tons. Regarding the amount of carbon dioxide accumulated, it was estimated at 71,471,824.94 tons. Furthermore, the estimated amount of biomass per plot varies between 2.71 and 172.82 t/ha. The carbon sequestration potential of these two units in woodlands and shrub savannahs is respectively 1.81 and 1.24 times that recorded on average in the RBTW. Shrub savannahs and wastelands are the units that sequestrate the least carbon dioxide at 18% and 2% of total CO2. Over the entire study area, the amount of carbon recorded ranges from 35.80 to 54.32 t/ha with an average of 41.24 ± 4.08 t/ha. The average amount in the Park is 40.42 ± 2.85 t/ha while it is 41.95 ± 4.78 t/ha for the periphery. The spatial distribution of biomass and carbon shows that high amounts of biomass and carbon are recorded in the south and particularly in the southwest of the RBTW.
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VODA, Rock, i Jude EGGOH. "Courbe environnementale de Kuznets : un réexamen des canaux de transmission dans les pays en développement". Revue d’Economie Théorique et Appliquée 13, nr 1 (30.06.2023): 21–40. http://dx.doi.org/10.62519/reta.v13n1a2.
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Résumé : Cet article revisite la relation entre la croissance économique et la qualité de l’environnement, en mettant en évidence les canaux de transmission, à partir d’un panel de 41 pays en développement sur la période 1995–2020. Au-delà des émissions de dioxyde de carbone (CO2), le présent article prend en compte d’autres gaz à effets de serre tels que le méthane (CH4) et protoxyde d’azote (N2O). La démarche méthodologique se base essentiellement sur des modèles de régression statiques et dynamiques. Les résultats obtenus confirment l’effet positif de l’accroissement du revenu sur la dégradation de l’environnement. Par ailleurs, l’examen de la non-linéarité a révélé que l’impact négatif de l’accroissement du revenu sur la qualité de l’environnement peut être atténué si l’accroissement du revenu contribue à l’amélioration du niveau d’éducation, des IDE, du développement financier, de l’ouverture commerciale, ou encore de l’urbanisation. Ces résultats ont permis de formuler des recommandations de politiques économiques. Mots-clés : Croissance économique, Émissions de CO2, Courbe de Kuznets environnementale Kuznets environmental curve: a re-examination of transmission channels in developing countries. Summary: This paper revisits the relationship between economic growth and environmental quality, highlighting the transmission channels, based on a panel of 41 developing countries over the period 1995-2020. The methodological approach is based on statics and dynamics regression models. Beyond carbon dioxide CO2 emissions, this article accounts for other greenhouse gases such as methane (CH4) and nitrous oxide (N2O). The results confirm the positive effect of income growth on environmental degradation. In addition, the examination of non-linearity revealed that the negative impact of income growth on environmental quality can be mitigated if income growth contributes to improvements in education, FDI, financial development, trade openness and urbanization. These results make it possible to formulate economic policies recommendations. Keywords: Economic growth, CO2 emissions, Environmental Kuznets curve JEL Classification: O40 – Q53 – Q56.
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Baoula, Kodjo. "Énergie renouvelable, croissance économique et atténuation des émissions de dioxyde de carbone dans les pays de l’UEMOA". Revue Internationale des Économistes de Langue Française 7, nr 2 (2022): 114–43. http://dx.doi.org/10.18559/rielf.2022.2.5.
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Renewable energy, economic growth and carbon emission attenuation in WAEMU countries. The effectiveness of renewable energies in ensuring economic growth and environmental quality is becoming an important topic in the economic literature, due to the fact that the predominantly used fossil energies which are threatened by the risk of depletion lead to an increase in greenhouse gas emissions. The present paper aims to analyze the effect of renewable energy consumption on economic growth and carbon dioxide emissions in the WAEMU countries. To this end, we use growth and environment functions with an empirical investigation based on a linear regression in panel data consisting of the WAEMU countries over the period 1990 to 2015. The results of the estimations by the Pooled Mean Group method developed by Pesaran and others (1999) mainly show that in the long run, the use of renewable energy contributes significantly to promoting economic growth and attenuating environmental degradation through the reduction of carbon emissions. Therefore, policy makers should orient the Union ’ s energy policy towards an energy mix dominated by the production and consumption of renewable energy; while at the same time putting in place a policy to control CO2 emissions.
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Zolotareva, O. K. "BIOCATALYTIC CARBON DIOXIDE CAPTURE PROMOTED BY CARBONIC ANHYDRASE". Biotechnologia Acta 16, nr 5 (31.10.2023): 5–21. http://dx.doi.org/10.15407/biotech16.05.005.
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The rapid and steady increase in the concentration of CO2, the most abundant greenhouse gas in the atmosphere, leads to extreme weather and climate events. Due to the burning of fossil fuels (oil, coal and natural gas), the concentration of CO2 in the air has been increasing in recent decades by more than 2 ppm per year, and in the last year alone - by 3.29 ppm. To prevent the "worst" scenarios of climate change, immediate and significant reductions in CO2 emissions through carbon management are needed. Aim. Analysis of the current state of research and prospects for the use of carbonic anhydrase in environmental decarbonization programs. Results. Carbonic anhydrase (CA) is an enzyme that accelerates the exchange of CO2 and HCO3 in solution by a factor of 104 to 106. To date, 7 types of CAs have been identified in different organisms. CA is required to provide a rapid supply of CO2 and HCO3 for various metabolic pathways in the body, explaining its multiple independent origins during evolution. Enzymes isolated from bacteria and mammalian tissues have been tested in CO2 sequestration projects using carbonic anhydrase (CA). The most studied is one of the isoforms of human KAz - hCAII - the most active natural enzyme. Its drawbacks have been instability over time, high sensitivity to temperature, low tolerance to contaminants such as sulphur compounds and the impossibility of reuse. Molecular modelling and enzyme immobilisation methods were used to overcome these limitations. Immobilisation was shown to provide greater thermal and storage stability and increased reusability. Conclusions. Capturing carbon dioxide using carbonic anhydrase (CA) is one of the most cost-effective methods to mitigate global warming, the development of which requires significant efforts to improve the stability and thermal stability of CAs.
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Fidele, Nzihou Jean, Hamidou Salou, Segda Bila Gerard, Ouattara Frederic i Compaore Hamidou. "Effects of a Cyclone Dimensions on Quality of Syngas Produced with a Wood-fired Biomass Gasifier". Journal of Energy Research and Reviews 15, nr 3 (25.10.2023): 1–14. http://dx.doi.org/10.9734/jenrr/2023/v15i3312.
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Charcoal gasification was widely used during the second World War to deal with petroleum scarcity. When petroleum was again available after the war, gasification was neglected afterwards. However, fossils resources are know as non-renewable and there are several reseach carried out all over the world to develop renewable sources of energy. Under that scope gasifiers are of great interest in the developing countries for developing individual or decentralised sources of energy. Even in developed countries, several research and implementation of gasification units are in progress.
In a previous work, we designed and fabricated a downdraft biomass gasifier with a relatively big cyclone and filtration units. Produced syngas was full of moisture and carbon dioxyde (CO2) when the gasifier was feed with wood, but moisture content was lesser with charcoal. Therefore further work should be carried out in order to use low density wood itself from agricultural, furniture makers or sawmill wastes.
We compared different cyclone separator design methods, adopted the Lapple’s cutt of model and found that to obtain good removal efficiency of unwanted particles, it is better to work with small cyclones. The new cyclone that we built allowed us on the one hand to reduce the humidity of the synthesis gas obtained, and on the other hand to reduce the quantity of tars in the liquid collected at the bottom of the cyclone. These improvements have led to the production of cleaner and better fuel syngas.
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Sima, Sergiu, i Catinca Secuianu. "The Effect of Functional Groups on the Phase Behavior of Carbon Dioxide Binaries and Their Role in CCS". Molecules 26, nr 12 (18.06.2021): 3733. http://dx.doi.org/10.3390/molecules26123733.
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In recent years we have focused our efforts on investigating various binary mixtures containing carbon dioxide to find the best candidate for CO2 capture and, therefore, for applications in the field of CCS and CCUS technologies. Continuing this project, the present study investigates the phase behavior of three binary systems containing carbon dioxide and different oxygenated compounds. Two thermodynamic models are examined for their ability to predict the phase behavior of these systems. The selected models are the well-known Peng–Robinson (PR) equation of state and the General Equation of State (GEOS), which is a generalization for all cubic equations of state with two, three, and four parameters, coupled with classical van der Waals mixing rules (two-parameter conventional mixing rule, 2PCMR). The carbon dioxide + ethyl acetate, carbon dioxide + 1,4-dioxane, and carbon dioxide + 1,2-dimethoxyethane binary systems were analyzed based on GEOS and PR equation of state models. The modeling approach is entirely predictive. Previously, it was proved that this approach was successful for members of the same homologous series. Unique sets of binary interaction parameters for each equation of state, determined for the carbon dioxide + 2-butanol binary model system, based on k12–l12 method, were used to examine the three systems. It was shown that the models predict that CO2 solubility in the three substances increases globally in the order 1,4-dioxane, 1,2-dimethoxyethane, and ethyl acetate. CO2 solubility in 1,2-dimethoxyethane, 1.4-dioxane, and ethyl acetate reduces with increasing temperature for the same pressure, and increases with lowering temperature for the same pressure, indicating a physical dissolving process of CO2 in all three substances. However, CO2 solubility for the carbon dioxide + ether systems (1,4-dioxane, 1,2-dimethoxyethane) is better at low temperatures and pressures, and decreases with increasing pressures, leading to higher critical points for the mixtures. By contrast, the solubility of ethyl acetate in carbon dioxide is less dependent on temperatures and pressures, and the mixture has lower pressures critical points. In other words, the ethers offer better solubilization at low pressures; however, the ester has better overall miscibility in terms of lower critical pressures. Among the binary systems investigated, the 1,2-dimethoxyethane is the best solvent for CO2 absorption.
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Rambeli@Ramli, Norimah, Norasibah Abdul Jalil, Emilda Hashim, Maryam Mahdinezhad, Asmawi Hashim, Belee . i Syazwani Mohd Bakri. "The Impact of Selected Macroeconomic Variables on Carbon Dioxide (Co2) Emission in Malaysia". International Journal of Engineering & Technology 7, nr 4.15 (7.10.2018): 204. http://dx.doi.org/10.14419/ijet.v7i4.15.21447.
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This study tries to investigate the relationship between gross domestic product, electricity product, net trade, electricity consumption and oil price on carbon dioxide (Co2) emission in Malaysia. Thus, it uses the Ordinary Least Square (OLS) method in structuring the model estimation. By utilizing yearly time series data from 1980 to 2017, this study focuses on economics and statistical criteria analyses. According to sign analysis, the results suggest that, gross domestic product, electricity product, net trade and energy consumption affect carbon dioxides (Co2) positively. In contrast, the oil price affects carbon dioxides (Co2) negatively. Furthermore, the results in statistical criteria conclude that the gross domestic product, electricity product and energy consumption are the dominant factors that influence carbon dioxides combustion in the long run in Malaysia.
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Gessesse, Abrham Tezera, i Ge He. "Analysis of carbon dioxide emissions, energy consumption, and economic growth in China". Agricultural Economics (Zemědělská ekonomika) 66, No. 4 (29.04.2020): 183–92. http://dx.doi.org/10.17221/258/2019-agricecon.
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This study examines the nexus of carbon dioxide (CO2) emissions, energy consumption (EC) and gross domestic products (GDP), using an Autoregressive Distributed Lag (ARDL) bounds test approach of co-integration and error-correction model (ECM) for the period 1971–2015. The aim of the research is to i) examine the relationship between CO2 and GDP as “cross-coupling, relative decoupling, or absolute decoupling,” and validate the existence of the Environmental Kuznets Curve (EKC) hypothesis; ii) detect causality between CO2 emissions, EC, and GDP, and scrutinize their impacts. The ARDL results confirm a long-run and short-run co-integration relationship between the variables. The relationship between CO2 emissions and GDP is “relatively decoupling,” and the EKC exists in China. Its CO2 emissions are more explained by EC and contribute twofold of GDP. In the long run, there was significant negative causality from CO2 emission and GDP to EC. This indicates Chinese economic development structure should be re-designed towards energy-saving and decarbonized economic structure. Moreover, the central and provincial governments of China should synchronize optimal energy utilization and green economic structure to mitigate environmental deterioration and climate change.
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Khandaker, Tasmina, Muhammad Sarwar Hossain, Palash Kumar Dhar, Md Saifur Rahman, Md Ashraf Hossain i Mohammad Boshir Ahmed. "Efficacies of Carbon-Based Adsorbents for Carbon Dioxide Capture". Processes 8, nr 6 (30.05.2020): 654. http://dx.doi.org/10.3390/pr8060654.
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Carbon dioxide (CO2), a major greenhouse gas, capture has recently become a crucial technological solution to reduce atmospheric emissions from fossil fuel burning. Thereafter, many efforts have been put forwarded to reduce the burden on climate change by capturing and separating CO2, especially from larger power plants and from the air through the utilization of different technologies (e.g., membrane, absorption, microbial, cryogenic, chemical looping, and so on). Those technologies have often suffered from high operating costs and huge energy consumption. On the right side, physical process, such as adsorption, is a cost-effective process, which has been widely used to adsorb different contaminants, including CO2. Henceforth, this review covered the overall efficacies of CO2 adsorption from air at 196 K to 343 K and different pressures by the carbon-based materials (CBMs). Subsequently, we also addressed the associated challenges and future opportunities for CBMs. According to this review, the efficacies of various CBMs for CO2 adsorption have followed the order of carbon nanomaterials (i.e., graphene, graphene oxides, carbon nanotubes, and their composites) < mesoporous -microporous or hierarchical porous carbons < biochar and activated biochar < activated carbons.
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Gargoom, Ali Mohamed, i Gamal Ahmed Duweb. "Ultra-pulsed Carbon Dioxide Laser for the Treatment of Melanocytic Nevi". Dermatology and Dermatitis 4, nr 2 (30.10.2019): 01–04. http://dx.doi.org/10.31579/2578-8949/054.
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Abstract: Congenital melanocytic nevi (CMN) even small-sized as well as acquired melanocytic nevi (AMN) are of common cosmetic concerns and getting rid of them remain challenging. The aim of this study is to evaluate the efficacy and safety of the ultra-pulsed CO2 laser for the treatment of melanocytic nevi. 15 male and female Libyan patients with 16 AMN and 7 CMN were treated with multiple sessions of ultra-pulsed CO2 laser at 1-month intervals. Clinical response at 6 months after final treatment was graded as poor (< 50%), moderate (50–75%), good (> 75%) and excellent where the skin of the lesion returned normal as the rest of the surrounding skin. All treated nevi showed good to excellent cosmetic outcomes after 2 or 4 treatment sessions. The post laser complication were minimal and transit except for one atrophic scar. No recurrence of pigmentation during the six months of follow-up period. Conclusion: Ultra-pulsed CO2 laser seems to be effective and associate with minimum adverse side effect in the treatment of small CMN and AMN.
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Vargas-Sánchez, Mariana, Javier Alcocer, Eric Puche i Salvador Sánchez-Carrillo. "Abiotic processes control carbon dioxide dynamics in temperate karst lakes". PeerJ 12 (22.05.2024): e17393. http://dx.doi.org/10.7717/peerj.17393.
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Inland waters are crucial in the carbon cycle, contributing significantly to the global CO2 fluxes. Carbonate lakes may act as both sources and sinks of CO2 depending on the interactions between the amount of dissolved inorganic carbon (DIC) inputs, lake metabolisms, and geochemical processes. It is often difficult to distinguish the dominant mechanisms driving CO2 dynamics and their effects on CO2 emissions. This study was undertaken in three groundwater-fed carbonate-rich lakes in central Spain (Ruidera Lakes), severely polluted with nitrates from agricultural overfertilization. Diel and seasonal (summer and winter) changes in CO2 concentration (CCO2) DIC, and CO2 emissions-(FCO2)-, as well as physical and chemical variables, including primary production and phytoplanktonic chlorophyll-a were measured. In addition, δ13C-DIC, δ13C-CO2 in lake waters, and δ13C of the sedimentary organic matter were measured seasonally to identify the primary CO2 sources and processes. While the lakes were consistently CCO2 supersaturated and FCO2 was released to the atmosphere during both seasons, the highest CCO2 and DIC were in summer (0.36–2.26 µmol L–1). Our results support a strong phosphorus limitation for primary production in these lakes, which impinges on CO2 dynamics. External DIC inputs to the lake waters primarily drive the CCO2 and, therefore, the FCO2. The δ13C-DIC signatures below –12‰ confirmed the primary geogenic influence on DIC. As also suggested by the high values on the calcite saturation index, the Miller-Tans plot revealed that the CO2 source in the lakes was close to the signature provided by the fractionation of δ13C-CO2 from calcite precipitation. Therefore, the main contribution behind the CCO2 values found in these karst lakes should be attributed to the calcite precipitation process, which is temperature-dependent according to the seasonal change observed in δ13C-DIC values. Finally, co-precipitation of phosphate with calcite could partly explain the observed low phytoplankton production in these lakes and the impact on the contribution to increasing greenhouse gas emissions. However, as eutrophication increases and the soluble reactive phosphorus (SRP) content increases, the co-precipitation of phosphate is expected to be progressively inhibited. These thresholds must be assessed to understand how the CO32− ions drive lake co-precipitation dynamics. Carbonate regions extend over 15% of the Earth’s surface but seem essential in the CO2 dynamics at a global scale.
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ALENZA GARCÍA, José Francisco. "Perplejidad ante el almacenamiento geológico del dióxido de carbono". RVAP 99-100, nr 99-100 (30.12.2014): 225–45. http://dx.doi.org/10.47623/ivap-rvap.99.100.2014.007.
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LABURPENA: Teknologiak aurrera egin ahala ingurumenean sortzen diren arriskuen kudeaketa juridikoa erronka zaila izaten da legegilearentzat. Ikusi besterik ez dago zer ahultasun dituen karbono dioxidoaren biltegiratze geologikoari buruzko abenduaren 29ko 40/2010 Legeak, arlo horretako arautegi nagusia denak. Lan honetan, ahultasun horietako batzuk lantzen dira: adibidez, gaiari buruzko berariazko lege bat egin beharra, eskumenen arazoa, instalazio igorle handiek CO2 biltegiratzeko obligaziorik ez izatea, eta Administrazio publikoei erantzukizuna transferitzearen erregulazioa. RESUMEN: Los retos juridicos de la gestion de los riesgos ambientales derivados del avance tecnologico no siempre encuentran una adecuada respuesta por el legislador. Una buena muestra de ello son las inconsistencias que presenta la regulacion del almacenamiento geologico del dioxido de carbono en nuestro pais llevada a cabo, fundamentalmente, por la Ley 40/2010, de 29 de diciembre, de almacenamiento geologico de dioxido de carbono. En este trabajo se analizan alguna de ellas como la necesidad de elaborar una ley especifica sobre la materia, la controvertida cuestion competencial, la ausencia de imposicion obligatoria del almacenamiento de CO2 a las grandes instalaciones emisoras y la regulacion de la transferencia de responsabilidad a las Administraciones publicas. ABSTRACT: The legal challenges of the enviromental risks management that derive from the technological progress do not always find a suitable answer in the legislator. A good example of it are the inconsistencies in the regulation of the geological storage of carbon dioxide in our country, specialy, by Act 40/2010 of December 29th of geological storage of carbon dioxide. In this work some of those are analyzed as for example the need to draft a specific act on the subject, the controversial issue of competences, the lack of a compulsory imposition to store CO2 to the large emitting facilities and the regulation of the transfer of liabilities to the public administrations.
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Schunemann, H. J., i R. A. Klocke. "Influence of carbon dioxide kinetics on pulmonary carbon dioxide exchange". Journal of Applied Physiology 74, nr 2 (1.02.1993): 715–21. http://dx.doi.org/10.1152/jappl.1993.74.2.715.
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In the absence of erythrocytes, carbonic anhydrase (CA) localized to the pulmonary capillary endothelium catalyzes the dehydration of bicarbonate to CO2. We studied the effects of lung CA and the reactions of CO2 on CO2 excretion in isolated lungs perfused with buffer. In indicator-dilution experiments, recoveries of dissolved CO2 and acetylene (C2H2) in the venous effluent were delayed significantly compared with a vascular indicator because the gases were distributed in both the vascular and alveolar volumes. In a second group of experiments, the kinetics of CO2 excretion were monitored with a plethysmographic method after injection of a bolus containing dissolved CO2 or bicarbonate. Exchange was compared with excretion of dissolved C2H2. The rate of excretion of dissolved CO2 and C2H2 was identical, indicating that CO2 is exchanged in the same manner as an inert gas. When bicarbonate was injected, CO2 excretion lagged behind C2H2 excretion by approximately 0.3 s. Inhibition of lung CA with acetazolamide reduced the quantity of CO2 exchanged to one-fourth of control and decreased the delay in exchange by one-half.
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Mezza, Alessio, Angelo Pettigiani, Nicolò B. D. Monti, Sergio Bocchini, M. Amin Farkhondehfal, Juqin Zeng, Angelica Chiodoni, Candido F. Pirri i Adriano Sacco. "An Electrochemical Platform for the Carbon Dioxide Capture and Conversion to Syngas". Energies 14, nr 23 (24.11.2021): 7869. http://dx.doi.org/10.3390/en14237869.
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We report on a simple electrochemical system able to capture gaseous carbon dioxide from a gas mixture and convert it into syngas. The capture/release module is implemented via regeneration of NaOH and acidification of NaHCO3 inside a four-chamber electrochemical flow cell employing Pt foils as catalysts, while the conversion is carried out by a coupled reactor that performs electrochemical reduction of carbon dioxide using ZnO as a catalyst and KHCO3 as an electrolyte. The capture module is optimized such that, powered by a current density of 100 mA/cm2, from a mixture of the CO2–N2 gas stream, a pure and stable CO2 outlet flow of 4–5 mL/min is obtained. The conversion module is able to convert the carbon dioxide into a mixture of gaseous CO and H2 (syngas) with a selectivity for the carbon monoxide of 56%. This represents the first all-electrochemical system for carbon dioxide capture and conversion.
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KUCUKEFE, Bige, i Nilüfer KAYA KANLI. "Uluslararası Çevresel Anlaşmaların İş Çevrimleri ve Karbondioksit Emilinin Döngüsel Bileşenleri Üzerindeki Etkisi". Fiscaoeconomia 6, nr 3 (14.09.2022): 1036–58. http://dx.doi.org/10.25295/fsecon.1072528.
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The relationship between cyclic components of carbon dioxide (CO2) emissions and gross domestic product (GDP) growth is procyclical for a typical economy. Potential effects of a policy decision on the environment require policymakers to consider the impact of GDP growth on CO2 emissions for a country. This paper investigates the changing dynamics of procyclicality of CO2 emissions with respect to GDP growth following the Kyoto protocol which represents a strong commitment for a green economy by the industrialized countries. We compare two time periods (1970-2005 and 2006-2017) before and after the Kyoto Protocol by calculating the Pearson correlation coefficients and using linear regression models for 48 countries which produced 79% of the world total CO2 emissions in 2017. Our study finds that the procyclicality of the CO2 emissions and GDP growth decreased in 29 countries and increased in 19 countries in the period 2006-2017 following the Kyoto Protocol. We extract the cyclical components by Hodrick-Prescot filter. We also build VAR models and compute impulse response functions, which agree with the statistical findings.
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Shcherbyna, Yevhen, Oleksandr Novoseltsev i Tatiana Evtukhova. "Overview of carbon capture, utilisation and storage technologies to ensure low-carbon development of energy systems". System Research in Energy 2022, nr 2 (27.12.2022): 4–12. http://dx.doi.org/10.15407/srenergy2022.02.004.
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Carbon dioxide CO2 is a component of air that is responsible for the growing global warning and greenhouse gases emissions. The energy sector is one of the main sources of CO2 emissions in the world and especially in Ukraine. Carbon capture, utilization and storage (CCUS) is a group of technologies that play a significant role along with renewable energy sources, bioenergy and hydrogen to reduce CO2 emissions and to achieve international climate goals. Nowadays there are thirty-five commercial CCUS facilities under operation around the world with a CO2 capture capacity up to 45 million tons annually. Tougher climate targets and increased investment provide new incentives for CCUS technologies to be applied more widely. CCUS are applications in which CO2 is captured from anthropogenic sources (power generation and industrial processes) and stored in deep geological formations without entering atmosphere or used in various products using technologies without chemical modification or with conversion. The article discusses the use of various technologies of CO2 capture (post-combustion capture, pre-combustion capture and oxy-combustion capture), CO2 separation methods and their application in the global energy transition to reduce the carbon capacity of energy systems. Technical and economic indicators of CO2 capture at different efficiencies for coal and gas power plants are given. Technologies of transportation and storage of captured carbon dioxide and their economic indicators are considered. The directions for the alternative uses of captured CO2, among which the main ones are the production of synthetic fuels, various chemicals and building materials, are also presented and described in the paper. The possibility of utilization captured СО2 in the production of synthetic fuel in combination with Power-to-Gas technologies was studied. Keywords: greenhouse gases emissions, fossil fuels, СО2 capture technologies, capture efficiency, synthetic fuel
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Serafin, Jarosław. "Utilization of spent dregs for the production of activated carbon for CO2 adsorption". Polish Journal of Chemical Technology 19, nr 2 (1.06.2017): 44–50. http://dx.doi.org/10.1515/pjct-2017-0026.
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Abstract The objective of this work was preparation of activated carbon from spent dregs for carbon dioxide adsorption. A saturated solution of KOH was used as an activating agent. Samples were carbonized in the furnace at the temperature of 550°C. Textural properties of activated carbons were obtained based on the adsorption-desorption isotherms of nitrogen at −196°C and carbon dioxide at 0°C. The specific surface areas of activated carbons were calculated by the Brunauer – Emmett – Teller equation. The volumes of micropores were obtained by density functional theory method. The highest CO2 adsorption was 9.54 mmol/cm3 at 0°C – and 8.50 mmol/cm3 at 25°C.
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Rahman, Haolia, Agus Sukandi, Nasruddin Nasruddin, Arnas Arnas i Remon Lapisa. "Mechanical Ventilation Control Based on Estimated occupancy using a Carbon Dioxide Sensor". TEKNIK 41, nr 3 (23.11.2020): 232–38. http://dx.doi.org/10.14710/teknik.v41i3.33416.
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Ventilation is an important aspect to maintain good indoor air quality in a building. However, excessive ventilation causing high energy consumption of the HVAC system. The ASHRAE Standard provides a guideline to set the ventilation rate that depends on the occupants' number and space. Thus, quantification of the number of occupants is required to regulate the ventilation rate. In this study, the estimated number of occupants was estimated using a Bayesian MCMC method based on CO2 levels. The mass balance equation of the CO2 is used as a model for the calculation of Bayesian MCMC. The Bayesian method for estimating the occupants' number is tested in a 96,7 m3 office room equipped with a ventilation system. Thus the occupancy estimation and control of ventilation can be done in real-time. The test also includes conventional ventilation control based on CO2 levels directly without converting to the occupants' number. The ventilation rate based on the number of occupants at the present test chamber refers to ASHRAE 62.1. The test results show that ventilation controlled by the estimated number of occupants using the Bayesian method successfully conducted with ventilation rate per occupant closer to the ASHRAE 62.1 standard over conventional ventilation method
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Lanjewar, Aditya Anand. "CO2 Sequestration". Research and Analysis Journal 4, nr 10 (9.10.2021): 01. http://dx.doi.org/10.18535/raj/v4i10.01.
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Starting with an overview of Science, Engineering, Technology and Management. An application of Science is called Engineering; an application of Engineering is called Technology; and applying the Knowledge of Science, Engineering & Technology in Management. Globally, due to the realization that, from last three decades, carbon dioxide sequestration gaining interest to reduce the concentration of CO2. CO2 Sequestration terms as CO2 capture. In the atmosphere capture carbon dioxide through chemical process and physical process. This process is not new and used by petroleum, petrochemical, chemical and power industries. Carbon dioxide Sequestration Technology involves the process of extracting, separating, transporting and storage. Carbon dioxide emissions can be preventing before release into the atmosphere. By this, global warming can be defer and dangerous climate change can be stop. The most important challenges that should be considered are regulatory, political, technical and economical
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Hosny, Ahmed Samir. "Evaluation of Carbon Dioxide Angiography in Management of Critical Lower Limb Ischemia with Infrapopliteal Arterial Disease". International Journal of Surgery & Surgical Techniques 5, nr 1 (2021): 1–5. http://dx.doi.org/10.23880/ijsst-16000157.
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The aim of the study is to elaborate on the understanding of the application of the CO2 angiography in obtaining quality imaging of infrapopliteal diseased arteries by digital subtraction CO2 angiography, and angioplasty using the automated Angiodroid CO2 injector® (primary outcome). This is a retrospective observational non-randomized study that included 23 patients of critical LL ischemia having infrapopliteal disease alone or combined with the femoropopliteal disease along with typical renal impairment. Carbon dioxide digital subtraction angiography (CO2 DSA) was used for all the patients and the outcomes were subjected to the comparison by iodinated contrast by an operator. The study included 17 female and 6 male subjects. The age group of the patient was between 48 years and 78 years. The mean age was 61.8 ± 11.1 years. The quality of the images obtained from the CO2 DSA method adopted was categorized as: good images (9) 39%, Accepted (8) 34%, and bad (6) 26% images. No complication from CO2 injection occured for the patients, while leg pain was recorded in 4 patients during the CO2 injection (17.3%). The trial outcome elaborated and supported the safety of using CO2 angiography in the diagnosis and management of critical LL ischemia with infrapopliteal disease.
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Tagiyeva, Sh F., i E. H. Ismailov. "HETEROGENEOUS CATALYTIC HYDROGENATION OF CARBON DIOXIDE INTO HYDROCARBONS: ACHIEVEMENTS AND PROSPECTS". Chemical Problems 18, nr 4 (2020): 485–500. http://dx.doi.org/10.32737/2221-8688-2020-4-485-500.
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The works published over the past 10 years on the catalytic hydrogenation of carbon dioxide into methane and C2+ hydrocarbons are considered. The choice of catalysts based on their elemental and phase composition, structural-porous characteristics, grain-size and acidic properties, the reaction mechanism and problems and prospects for the industrial application of heterogeneous catalytic conversion of CO2 to hydrocarbons are discussed.
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Pahlipi, Muhammad Ridha, Ervina Aryanti, Mokhamad Irfan, Indah Permanasari i Ahmad Taufiq Arminudin. "EMISI GAS KARBON DIOKSIDA (CO2) PADA PERKEBUNAN KELAPA SAWIT (Elaeis guineensis Jacq) YANG DITUMPANGSARI DENGAN TANAMAN PANGAN DI LAHAN GAMBUT". JURNAL AGROTEKNOLOGI 7, nr 2 (1.02.2017): 35. http://dx.doi.org/10.24014/ja.v7i2.3355.
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Peat land conversion into oil palm plantations leads was increased emissions of carbon dioxide (CO2). Plants on peat land and environmental conditions believed to be factors in the emission of carbon dioxide (CO2). The porpuse of this research was determined the emissions of carbon dioxide (CO2) in oil palm plantations are intercropped with cropping crop on peat land and the influence of environmental factors on the emission of carbon dioxide (CO2). This research was conducted in September 2015 until April 2016 in Rimbo Panjang village, Subdiscrict Tambang, District of Kampar, Province of Riau. Cropping crop used were corn and soybeans. The method used in this study was a Random Block Design with four treatments and four replications. The treatments were palm - berau, palm oil - corn, palm oil - soybean, palm oil – intercropping (soybean – maize). Parameters measured were carbon dioxide (CO2), soil temperature, air temperature, the temperature of the lid, the depth of the water table and soil pH. The results showed that carbon dioxide emissions (CO2) in oil palm plantations are intercropped with cropping crop (corn and soybeans) were not significantly different. The influence of air temperature, soil temperature, the temperature of the lid, and the depth of the ground water level were inversely and insignificant to the emission of carbon dioxide (CO2). As for getting nearly neutral pH, the emission of carbon dioxide (CO2) is increasing, but insignificant.
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Rosadi, Dedi, Randhi Saily, Zaiyar Zaiyar i Ulfa Jusi. "IDENTIFIKASI JEJAK KARBON SKALA RUMAH TANGGA SEBAGAI UPAYA MENGATASI PERUBAHAN IKLIM". INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) 5, nr 2 (29.12.2022): 15–23. http://dx.doi.org/10.25105/cesd.v5i2.15629.
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The high level of population density in RT 002 / RW 009 Labuh Baru Timur Village, Payung Sekaki District, Pekanbaru City has the potential to be a contributor to CO2 carbon dioxide emissions. The resulting carbon emissions are from electrical energy and food consumption. The formulation of the problem of this research is how the value of the carbon footprint resulting from the consumption of food and electricity energy. The purpose of this study is to determine the value of carbon emissions. Based on the data obtained, the value of emissions from the electricity sector is 1061.106786 (kg CO2)/day, the food consumption sector is 526.33299 (kg CO2)/day. The highest emission value produced by the electricity sector from the 32nd respondent was 18.39823 (kg C02)/day, and the food consumption sector from the 48th respondent was 13.55319 (kg C02)/day.
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Feng, Zikun. "Current Research on CO2 Reduction Technology". Highlights in Science, Engineering and Technology 90 (8.04.2024): 112–16. http://dx.doi.org/10.54097/8q98cj44.
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The technology of carbon dioxide reduction has become a focus of research in the fields of environmental protection and sustainable development. With the exacerbation of global warming and energy crises, the issue of carbon dioxide emissions has become increasingly severe, exerting immense pressure on human society and the natural environment. In this context, carbon dioxide reduction technology has emerged as one of the important approaches to addressing climate change and energy demands. This technology involves the reaction of carbon dioxide with hydrogen or other reducing agents to produce organic compounds or fuels. Its advent not only promises to reduce carbon dioxide emissions but also to convert carbon dioxide into useful organic compounds or fuels, thereby facilitating the recycling of resources. The development of carbon dioxide reduction technology holds significant implications for addressing climate change and energy demands. By employing this technology, discarded carbon dioxide can be transformed into valuable products, reducing reliance on fossil fuels, lowering greenhouse gas emissions, and providing new energy sources for sustainable development. Furthermore, carbon dioxide reduction technology has the potential to integrate with other fields such as photocatalysis and electrochemistry, further expanding its application scope and reducing costs. This paper aims to provide reference and guidance for further research and industrial application of carbon dioxide reduction technology, promoting its sustainable utilization and environmental friendliness in practical production.
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Golubev, O. V., P. S. Il'chuk, A. A. Sadovnikov i A. L. Maksimov. "Carbon Dioxide Utilization Using Plasma Reactor Packed with Magnesia-Ceria Catalysts with Various Morphology". Нефтехимия 63, nr 5 (15.12.2023): 720–34. http://dx.doi.org/10.31857/s0028242123050106.
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A series of CeO2–MgO catalysts with different molar ratio was prepared for the plasma-activated CO2 decomposition to CO and O2. The catalysts were synthesized by the sol-gel method and characterized by physicochemical methods (XRD, SEM, XPS, low-temperature N2 adsorption, CO2-TPD). The highest CO2 conversion (31%) was achieved in the presence of the catalyst with the highest CeO2 content. The addition of H2 into a CO2 decomposition system was also studied. No CO2 methanation occurred in the presence of synthesized catalysts, though an increase in the CO2-to-CO conversion was observed due to an increase of a discharge power in the presence of molecular hydrogen.
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Petroianu, Georg, Wolfgang Maleck, Wolfgang Bergler i Roderich Ruefer. "Carbon Monoxide and Nonquantitative Carbon Dioxide Detection". Prehospital and Disaster Medicine 11, nr 4 (grudzień 1996): 276–79. http://dx.doi.org/10.1017/s1049023x00043120.
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AbstractIntroduction:The capnometric demonstration of end-tidal carbon dioxide (CO2) is a reliable method of differentiating between a correct endotracheal tube position and an accidental misplacement of the tube into the esophagus. Recently, several CO2 detectors have been introduced for monitoring end-tidal CO2 in the “out-of-hospital” setting, where quantitative capnometry with capnography is not yet available.Hypothesis:These devices are not influenced by carbon monoxide (CO) present in lethal concentration.Methods:A heated (37°C) 2.3 L reservoir bag filled one-third full with water (representing the stomach in esophageal misintubation) was machine ventilated (tidal volume: 450 ml; frequency: 16/min) with the following mixtures for three minutes each: 1) 95% O2, 5% CO; 2) 45% O2 5% CO, 50% N2O; and 3) 44% O2 5% CO, 50% N2O, 1% halothane. The presence of end-tidal CO2 was monitored with each of the following devices: 1) MiniCAP™ III CO2 Detector; 2) StatCAP™ CO2 Detector; 3) EasyCAP™ CO2 Detector; PediCAP™ CO2 Detector; and 5) Colibri™ CO2 Detector.Results:In none of the cases was the presence of CO2 signaled by the detector.Conclusion:The presence of 5% CO does not interfere with infrared spectrometry detection (MiniCAP™ and StatCAP™) or chemical detection (EasyCAP™, PediCAP™, and Colibri™) of CO2. The devices can be used safely in patients with CO poisoning for monitoring of endotracheal tube position.
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Peres, Christiano B., Pedro M. R. Resende, Leonel J. R. Nunes i Leandro C. de Morais. "Advances in Carbon Capture and Use (CCU) Technologies: A Comprehensive Review and CO2 Mitigation Potential Analysis". Clean Technologies 4, nr 4 (17.11.2022): 1193–207. http://dx.doi.org/10.3390/cleantechnol4040073.
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One of society’s major current challenges is carbon dioxide emissions and their consequences. In this context, new technologies for carbon dioxide (CO2) capture have attracted much attention. One of these is carbon capture and utilization (CCU). This work focuses on the latest trends in a holistic approach to carbon dioxide capture and utilization. Absorption, adsorption, membranes, and chemical looping are considered for CO2 capture. Each CO2 capture technology is described, and its benefits and drawbacks are discussed. For the use of carbon dioxide, various possible applications of CCU are described, starting with the utilization of carbon dioxide in agriculture and proceeding to the conversion of CO2 into fuels (catalytic processes), chemicals (photocatalytic processes), polymers, and building supplies. For decades, carbon dioxide has been used in industrial processes, such as CO2-enhanced oil recovery, the food industry, organic compound production (such as urea), water treatment, and, therefore, the production of flame retardants and coolants. There also are several new CO2-utilization technologies at various stages of development and exploitation, such as electrochemical conversion to fuels, CO2-enhanced oil recovery, and supercritical CO2. At the end of this review, future opportunities are discussed regarding machine learning (ML) and life cycle assessment (LCA).
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Istadi, I., Nor Aishah Saidina Amin i Mohd Nizam Ahmad Sanusi. "Optimization of Ni loading and operating conditions for carbon dioxide reforming of methane over NiO/CeO2 catalyst using response surface methodology". Jurnal Teknik Kimia Indonesia 4, nr 2 (2.10.2018): 248. http://dx.doi.org/10.5614/jtki.2005.4.2.8.
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Optimization of Ni loading and operating conditions for carbon dioxide reforming of methane over NiO/CeO2 catalyst using response surface methodologyModelling and optimization of Carbon Dioxide Reforming of Methane (CORM) reaction over NiO/CeO2 catalyst were developed using Response Surface Methodology (RSM). Relationship between responses, i.e. CH, conversion, H2 and CO selectivities, and three independent variables, i.e. reactor temperature, CO2/CH4 ratio, and wt. % Ni in the CeO-supported catalyst, were presented as empirical mathematical models. The models showed a good fitting to the experimental data statistically. The NiO/CeO2 showed a potential catalyst for the CORM process, though some coking formations were found. The catalysts exhibited a promising catalytic performance with the unity H2/CO ratio in the product, high methane conversion, and low reverse water gas shift reaction. The reactor temperature, CO2/CH4 ratio, and wt. % Ni in the CeO2-supported catalyst being 840oC, 1, and 6.5%, respectively were suggested with respect to CH4 conversion, H2 and CO selectivity, and H2/CO ratio of 75.7%, 68.5%, 54.5%, and 1.03, respectively. Keywords: Carbon dioxide reforming of methane, NiO/CeO, catalyst, Response Surface Methodology AbstrakPermodelan dan optimisasi reaksi pembentukan kembali metana dengan karbondioksida (CORM) melalui katalis NiO/CeO2 telah dikembangkan dengan menggunakan Response Surface Methodology (RSM). Hubungan antara respon-respon (konversi CH, selektifitas H2 and CO) dengan tiga peubah tak bergantung (temperatur reaktor; rasio CO2/CH4, dan % berat Ni dalam katalis berpenyangga CeO) dinyatakan dalam model matematika empiris. Model empiris tersebut secara statistik menunjukkan korelasi yang baik terhadap data-data eksperimen. NiO/CeO2 tersebut menunjukkan sebuah katalis yang berpotensi untuk proses CORM. Katalis tersebut menunjukkan kinerja katalitik yang menjanjikan dengan rasio H2/CO mendekati satu dalam produk, konversi metana yang tinggi, dan reaksi reverse water gas shift yang rendah. Temperatur reactor 840oC, rasio CO2/CH4, 1, dan 6.5 wt. % Ni adalah direkomendasikan dengan konversi CH4 75.7%, selektifitas H2 68.5%, selektifitas CO 54.5%, dan rasio H2/CO 1.03. Kata Kunci: Pembentukan kembali metana dengan karbondioksida, Katalis NiO/CeO2, Response Surface Methodology
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Lee, Ming Ju, Ming Gin Lee, Yung Chih Wang, Yu Min Su i Jia Lun Deng. "Preliminary Study on Reaction of Fresh Concrete with Carbon Dioxide". Defect and Diffusion Forum 382 (styczeń 2018): 230–34. http://dx.doi.org/10.4028/www.scientific.net/ddf.382.230.
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In order to let fresh concrete react with carbon dioxide sufficiently, the carbon dioxide was added to mixing concrete. The study used three water cement ratio (0.55, 0.65, 0.75), three CO2 pressures (0.2, 0.4, 0.6 MPa), and two CO2 concentration (50% and 100%) to make concrete samples, and observed the effect of carbon dioxide adsorption in the above parameters. Finally, the compressive strength and carbonation degree of concretes were tested after three curing time (7, 14 and 28 days). The research showed that concrete could be more efficient to absorb carbon dioxide by using this pressure method. The results found that the mixing concrete react with carbon dioxide in a short time, and shorten the initial setting time of concrete. But this method would greatly reduce the workability of concrete after mixing with carbon dioxide and it might be enhanced by water or superplasticizer. The bond of cement matrix might cut down after reacting with carbon dioxide. Based on the above, the compressive strength of concrete which was mixed with carbon dioxide would be impaired. The proposed CO2-mixing method has the capacity to uptake 9.5% carbon dioxide based on water cement ratio and CO2 pressure.
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Mammadov, Kh, U. Aliyeva-Jabbarly i H. Shiraliyeva. "RADIOLYTIC PROCESSES IN MIXTURE OF WATER WITH CARBON DIOXIDE IN THE PRESENCE OF ORGANIC MATRIX". Chemical Problems 20, nr 4 (2022): 347–57. http://dx.doi.org/10.32737/2221-8688-2022-3-347-357.
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The radiolysis of purified water, its mixture with carbon dioxide, and also with the addition of salt of potassium chloride isotope (40KCl) and plant mass to this system were carried out in order to study the mechanism of radiolytic processes taking place in the plant mass in the presence of the natural potassium isotope (40K) contained in it. It revealed that in the presence of 40KCl in the system, the formation of trace amounts of molecular hydrogen is observed (in accord with an insignificant dose of radiation from 40K). A decrease in the rate of formation of molecular hydrogen with an increase in the concentration of CO2 is observed during the radiolysis of a two-component system (H2O - CO2). An increase in the rate of formation of molecular hydrogen, carbon monoxide, methane and relatively heavy hydrocarbons (C6, C7, C8) accompanied by an increase in the absorbed dose of ionizing radiation (at stable concentrations of all components of the system) is observed when studying the kinetics of the formation of radiolysis products of the multicomponent system "H2O - CO2 - 40KCl - organic matrix". There is a tendency to reduce the rate of formation of molecular hydrogen and methane and increase the rate of formation of CO and relatively heavy (C6, C7, C8) hydrocarbons with an increase in CO2 concentration. The rates of formation of all products (H2, CO, CH4, and relatively heavy hydrocarbons) grow with an increase in the amount of organic matter in the mixture (at stable concentrations of CO2, H2O, and 40KCl). İt found that an increase in the mass of the organic matrix in the analyzed multicomponent system stimulates an increase in the formation of all radiolysis products. There is a decrease in the rate of formation of H2 and CH4, a relatively slow increase in the rate of formation of carbon monoxide, and an increase in the rate of elementary reactions of the transformation of light radiolysis products (H2, CO, CH4) into relatively heavy products (C6, C7, C8) together with an increase in CO2 concentration. The results obtained show the expediency of taking into account the contribution of ionizing radiation from radionuclides present in the environmental components, when considering multistage biochemical mechanisms of photosynthesis in order to explain the initiation of energy-intensive processes of CO2 and H2O decomposition
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Manan, Wan Nabilah, Wan Nor Roslam Wan Isahak i Zahira Yaakob. "CeO2-Based Heterogeneous Catalysts in Dry Reforming Methane and Steam Reforming Methane: A Short Review". Catalysts 12, nr 5 (19.04.2022): 452. http://dx.doi.org/10.3390/catal12050452.
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Transitioning to lower carbon energy and environment sustainability requires a reduction in greenhouse gases such as carbon dioxide (CO2) and methane (CH4) that contribute to global warming. One of the most actively studied rare earth metal catalysts is cerium oxide (CeO2) which produces remarkable improvements in catalysts in dry reforming methane. This paper reviews the management of CO2 emissions and the recent advent and trends in bimetallic catalyst development utilizing CeO2 in dry reforming methane (DRM) and steam reforming methane (SRM) from 2015 to 2021 as a way to reduce greenhouse gas emissions. This paper focus on the identification of key trends in catalyst preparation using CeO2 and the effectiveness of the catalysts formulated.
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Lutyński, M. "Impact of preparation and storage of activated carbon on the high pressure sorption of CO2". Bulletin of the Polish Academy of Sciences: Technical Sciences 62, nr 1 (1.03.2014): 113–19. http://dx.doi.org/10.2478/bpasts-2014-0013.
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Abstract Adsorption of carbon dioxide on activated carbons has become extremely interesting in the field of energy and environment. Activated carbon is either used as a model to understand sorption processes on coals as a part of research on CO2 geological storage/Enhanced Coalbed Methane or as an adsorbent for processes such as natural gas treatment or CO2 separation from flue gas. The paper presents results of high-pressure CO2 sorption at the temperature of 318K on two similar activated carbons (Filtrasorb 400 and WAZ 0.6-2.4 mm) where one sample of WAZ was not subjected to any pretreatment procedure. Experimental results were fitted with three parameter Langmuir and therefore it was possible to calculate CO2 adsorbed phase densities. The WAZ activated carbon has a slightly lower sorption even though it was pretreated with the same procedure. The untreated sample of WAZ exhibited sorption which was lower over 15%. Calculated adsorbed phase densities differ between the activated carbons and the lowest value was obtained for the untreated WAZ sample (21.0 mol/dm3).
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Muin, Musrizal. "Physical, Mechanical, and Biological Properties of Silafluofen-treated Tropical Wood Using Multi-Phase Carbon Dioxide Impregnation". Wood Research Journal 2, nr 1 (31.08.2017): 42–45. http://dx.doi.org/10.51850/wrj.2011.2.1.42-45.
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A new approach in wood preservative treatment using carbon dioxide (CO2) as a carrier solvent has been developed and evaluated its effect on the physical, mechanical, and biological properties of treated tropical wood. It employs CO2 at various combinations of temperatures and pressures in a treatment vessel at once and is called Multi-Phase Carbon Dioxide (MPCO2) treatment. Three commercial tropical wood species (Agathis sp., Palaquium sp., and Heritiera sp.) measuring 1.5 cm (T) x 1.5 cm (R) x 15 cm (L) were prepared for the treatment with a termiticide (silafluofen). A treatment cycle was performed by loading two specimens of each wood species, applying the temperature of 15⁰C and pressure of 60 kg/cm2, gradually increasing the temperature and pressure, respectively, to 35⁰C and 80 kg/cm2, and releasing the pressure to atmosphere. The treatment was conducted with five replicates. Untreated and treated specimens were then evaluated their physical, mechanical, and biological properties. Results show that the MPCO2treatment significantly enhanced the termite resistance of treated wood without any adverse effects on their physical and mechanical properties.A new approach in wood preservative treatment using carbon dioxide (CO2) as a carrier solvent has been developed and evaluated its effect on the physical, mechanical, and biological properties of treated tropical wood. It employs CO2 at various combinations of temperatures and pressures in a treatment vessel at once and is called Multi-Phase Carbon Dioxide (MPCO2) treatment. Three commercial tropical wood species (Agathis sp., Palaquium sp., and Heritiera sp.) measuring 1.5 cm (T) x 1.5 cm (R) x 15 cm (L) were prepared for the treatment with a termiticide (silafluofen). A treatment cycle was performed by loading two specimens of each wood species, applying the temperature of 15⁰C and pressure of 60 kg/cm2, gradually increasing the temperature and pressure, respectively, to 35⁰C and 80 kg/cm2, and releasing the pressure to atmosphere. The treatment was conducted with five replicates. Untreated and treated specimens were then evaluated their physical, mechanical, and biological properties. Results show that the MPCO2 treatment significantly enhanced the termite resistance of treated wood without any adverse effects on their physical and mechanical properties.
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Nejad, Puriya Mohamad Gholy, i Mohammad Sadegh Hatamipour. "Investigation on the Removal of Carbon Dioxide Exhausted from Industrial Units in a Lab-Scale Fluidized Bed Reactor". Bulletin of Chemical Reaction Engineering & Catalysis 15, nr 2 (9.07.2020): 579–90. http://dx.doi.org/10.9767/bcrec.15.2.7882.579-590.
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In this study, CO2 removal efficiency from flue gas was investigated in a fluidized bed reactor under semi-dry conditions. A lab-scale fluidized bed reactor, filled with inert glass beads, was used to investigate the effect of operating parameters on the CO2 removal efficiency using calcium hydroxide slurry as the absorbent. The Taguchi design method was used to design the experiments. The maximum inlet concentration of CO2 was 3 vol%. The most important factors were the reaction surface area, inlet gas velocity, inlet CO2 concentration, absorbent solution flow rate, inlet gas temperature and calcium hydroxide slurry concentration. The experimental results indicated that the CO2 removal efficiency increased when increasing the effective surface area of the reaction. Moreover, the removal efficiency increased by decreasing the input gas flow rate and inlet CO2 concentration. By performing experiments under optimum conditions, the maximum obtained CO2 removal efficiency was 79%. Copyright © 2020 BCREC Group. All rights reserved
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Putra Negara, Dewa Ngakan Ketut, I. Made Widiyarta, I. Gusti Agung Kade Suriadi, I. Gusti Komang Dwijana, I. Made Dwi Budiana Penindra, I. Gusti Ngurah Putu Tenaya, I. Gusti Ketut Sukadana i Anton Saladin Ferdinand. "Development of mesoporous activated carbons derived from brewed coffee waste for CO2 adsorption". EUREKA: Physics and Engineering, nr 2 (22.03.2023): 17–27. http://dx.doi.org/10.21303/2461-4262.2023.002809.
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The primary cause of rising CO2 concentrations in the atmosphere is the use of fossil fuels in motor vehicles and factory activities in industry. CO2 levels in the atmosphere can be controlled and reduced by using low-carbon energy and capturing and storing CO2. One widely used way for CO2 capture and storage is adsorption method. This method necessitates the use of an adsorbent, one of which is activated carbon. In this study, brewed coffee waste was converted into activated carbons, characterized, and tested for carbon dioxide adsorption. Brewed coffee waste was dehydrated at 105 ºC for an hour before being carbonized at 550 °C and activated at 670, 700, and 730 °C, with a 200-ml/min nitrogen injection during activation. Activated carbons with activation temperatures of 670, 700, and 730 °C were denoted as AC-670, AC-700, and AC-730, respectively. A series of TGA, SEM, and adsorption isotherm tests were used to determine the proximate components, surface morphology, and surface structure of the activated carbons produced. To assess the adsorption capacities of activated carbon on CO2, the gravimetric CO2 adsorption isotherm method was used. According to the findings of the study, increasing activation temperatures cause variable properties in activated carbon. When using an activation temperature of 700 °C, the most appropriate properties of activated carbon can be obtained. It has 425.843 m2/g specific surface area, 0.345 cm3/g pore volume, 3.423 nm pore diameter, 235.628 cm3/g nitrogen adsorption capacity, and 4.183 mmol/g CO2 adsorption performance. This study provided a simple way converting brewed coffee waste into activated carbon with excellent performance for CO2 adsorption
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He, Liang-Nian, Jin-Quan Wang i Jing-Lun Wang. "Carbon dioxide chemistry: Examples and challenges in chemical utilization of carbon dioxide". Pure and Applied Chemistry 81, nr 11 (31.10.2009): 2069–80. http://dx.doi.org/10.1351/pac-con-08-10-22.
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The development of catalytic methods for chemical transformation of CO2 into useful compounds is of paramount importance from a standpoint of C1 chemistry and so-called green chemistry. The kinetic and thermodynamic stability of CO2 molecule presents significant challenges in designing efficient chemical transformations based on this potential feedstock. In this context, efforts to convert CO2 to useful chemicals will inevitably rely on its activation through molecular catalysts, particularly transition-metal catalysts. Two preparative processes employing solid catalyst or CO2-philic homogeneous catalyst were devised for environmentally benign synthesis of organic carbonates and oxazolidinones under solvent-free conditions. Those processes represent pathways for greener chemical fixations of CO2 to afford industrial useful materials such as organic carbonates and oxazolidinones with great potential applications.
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Szymańska, Alicja, Amelia Skoczek i Jacek Przepiórski. "Activated carbons from common nettle as potential adsorbents for CO2 capture". Polish Journal of Chemical Technology 21, nr 1 (1.03.2019): 59–66. http://dx.doi.org/10.2478/pjct-2019-0011.
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Abstract Activated carbons (ACs) prepared from common nettle (Urtica Dioica L.) were studied in terms of carbon dioxide adsorption. ACs were prepared by KOH chemical activation in a nitrogen atmosphere at temperatures (ranging from 500 to 850°C). The pore structure and the surface characterization of the ACs were specified based on adsorption-desorption isotherms of nitrogen measured at –196°C and carbon dioxide at 0°C. The specific surface area was calculated according to the BET equation. The pore volume was estimated using the DFT method. The highest values of the specific surface area (SSA) showed activated carbons produced at higher carbonization temperatures. All samples revealed presence of micropores and mesopores with a diameter range of 0.3–10 nm. The highest value of the CO2 adsorption, 4.22 mmol/g, was found for the material activated at 700°C.
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B S, Seema, Vijaya Kumar Y M, Yashaswini L i Natraj R L. "An Experimental Study on Curing of Mortar Cubes by Carbon Dioxide". Asian Journal of Applied Science and Technology 06, nr 02 (2022): 26–31. http://dx.doi.org/10.38177/ajast.2022.6204.
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Carbon dioxide (CO2) is the predominant greenhouse gas resulting from human industrial Activities. A significant fraction of CO2 discharged into the atmosphere comes from Industry point sources. Cement production alone contributes approximately 5% of global CO2 emissions. This emitted carbon dioxide, however, can be partially recycled into mortar through early age curing to form thermodynamically stable calcium carbonates. The carbonation reaction between carbon dioxide and appropriate calcium Compounds results in permanent fixation of the carbon dioxide in a thermodynamically stable calcium carbonate. Carbon dioxide and water can be found in almost every environment and thus all concretes will be subjected to carbonation. The experimental study on water cured and CO2 specimens for compression strength were carried out. The results show that mortar cubes has achieved increasing value as comparing with water curing.
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Pratama, Ikhwan Annas, i Jihad Lukis Panjawa. "ANALYSIS OF THE EFFECT OF GROSS DOMESTIC PRODUCT, FINANCIAL DEVELOPMENT, FOREIGN DIRECT INVESTMENT, AND ENERGY ON CO2 EMISSIONS IN INDONESIA FOR THE 1990-2020 PERIOD". JOURNAL OF HUMANITIES, SOCIAL SCIENCES AND BUSINESS (JHSSB) 1, nr 4 (27.08.2022): 189–208. http://dx.doi.org/10.55047/jhssb.v1i4.343.
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This study examines the factors influencing CO2 emissions from 1990 to 2020. In this study, CO2 emissions are the dependent variable, and the independent variables consist of financial development, foreign direct investment, economic growth, and energy, as measured by the Error Correction Model (ECM) method implemented in the E-views 10 software. This study discover that (1) Financial Development in the short and long term has no effect on carbon dioxide (CO2) emissions in Indonesia, (2) foreign direct investment in the short and long term has no effect on carbon dioxide (CO2) emissions in Indonesia, (3) economic growth in the short and long term has an insignificantly positive effect on carbon dioxide (CO2) emissions in Indonesia, and (4) energy has no effect on carbon dioxide (CO2) emissions in Indonesia.
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Sugumaran M. P., Gudimetha Ganesh Kumar, Porkodi G. i K. Kalaichelvi. "Exploring the Responses of Teak and Eucalyptus to Elevated Carbon Dioxide in a Changing Atmosphere". Asian Journal of Environment & Ecology 23, nr 3 (16.02.2024): 56–65. http://dx.doi.org/10.9734/ajee/2024/v23i3534.
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Global warming plays a major role in climate change that is mainly caused by the increase of atmospheric carbon dioxide (CO2) and other greenhouse gases (GHGs) such as Methane (CH4), Nitrous oxide(N2O) and Chloro Fluoro Carbons (CFC) level in the last two decades. These greenhouse gases partially absorb long wave radiation remitted by the earth’s warm surface and re-emit the same resulting in warming up in the atmosphere. Climate change can be identified by changes in mean and variability of its properties. Climate changes are operated by the increase of (Green House gases) of them Carbon dioxide (CO2) is one of the most important greenhouse gases because of which influence the growth and morphology of industrially important tree species in tropics. Teak and Eucalyptus are the economically important tree species grown throughout the world in current study found that morphological, physiological and biochemical changes under elevated CO2 conditions. Forests, comprising diverse ecosystems and housing a plethora of plant species, play a critical role in mitigating climate change by acting as carbon sinks. Among the key contributors to this dynamic, Teak and Eucalyptus, as prominent tropical tree species, have been identified for their potential to sequester carbon dioxide (CO2) and influence ecosystem dynamics. Understanding how these trees respond to elevated CO2 levels is imperative for predicting the resilience and adaptability of forest ecosystems in the face of ongoing climate change. As we navigate a changing climate, unraveling the intricacies of how these vital tree species interact with elevated CO2 provides crucial insights for informed forest management and conservation practices.
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Kvamme, Bjørn. "Feasibility of simultaneous CO2 storage and CH4 production from natural gas hydrate using mixtures of CO2 and N2". Canadian Journal of Chemistry 93, nr 8 (sierpień 2015): 897–905. http://dx.doi.org/10.1139/cjc-2014-0501.
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Production of natural gas from hydrate using carbon dioxide allows for a win-win situation in which carbon dioxide can be safely stored in hydrate form while releasing natural gas from in situ hydrate. This concept has been verified experimentally and theoretically in different laboratories worldwide, and lately also in a pilot plant in Alaska. The use of carbon dioxide mixed with nitrogen has the advantage of higher gas permeability. Blocking of flow channels due to formation of new hydrate from injected gas will also be less compared to injection of pure carbon dioxide. The fastest mechanism for conversion involves the formation of a new hydrate from free pore water and the injected gas. As a consequence of the first and second laws of thermodynamics, the most stable hydrate will form first in a dynamic situation, in which carbon dioxide will dominate the first hydrates formed from water and carbon dioxide / nitrogen mixtures. This selective formation process is further enhanced by favorable selective adsorption of carbon dioxide onto mineral surfaces as well as onto liquid water surfaces, which facilitates efficient heterogeneous hydrate nucleation. In this work we examine limitations of hydrate stability as function of gradually decreasing content of carbon dioxide. It is argued that if the flux of gas through the reservoir is high enough to prevent the gas from being depleted for carbon dioxide prior to subsequent supply of new gas, then the combined carbon dioxide storage and natural gas production is still feasible. Otherwise the residual gas dominated by nitrogen will still dissociate the methane hydrate, if the released in situ CH4 from hydrate does not mix in with the gas but escapes through separate flow channels by buoyancy. The ratio of nitrogen to carbon dioxide in such mixtures is therefore a sensitive balance between flow rates and formation rates of new carbon dioxide dominated hydrate. Hydrate instability due to undersaturations of hydrate formers have not been discussed in this work but might add additional instability aspects.
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Seng Wong, Tuck, i Kang Lan Tee. "CO2 bioeconomy: Creating value from carbon dioxide". Open Access Government 40, nr 1 (25.10.2023): 422–23. http://dx.doi.org/10.56367/oag-040-10701.
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CO2 bioeconomy: Creating value from carbon dioxide Is the CO2 bioeconomy creating value from carbon dioxide? Dr Kang Lan Tee and Professor Tuck Seng Wong both explain. Carbon dioxide is frequently portrayed as the villain of climate change. A 50% carbon dioxide content increase in less than 200 years (National Oceanic and Atmospheric Administration) is a stark reminder of its role in global warming. Scientists have also linked the rise of carbon dioxide with the greenhouse effect in the past 66 million years (Annual Review of Earth and Planetary Sciences). Beyond scientific reports, we have experienced the heat-dome scorching our summer and witnessed record temperatures in the UK, with the highest temperature recorded at 40.3°C on 19 July 2022. Is carbon dioxide to blame for climate change?
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Guo, Jiaqi, Yijia Hu i Yifan Zhao. "The Development of Carbon Dioxide Captures and Biochemical Transformation of Carbon Dioxide". Highlights in Science, Engineering and Technology 6 (27.07.2022): 372–81. http://dx.doi.org/10.54097/hset.v6i.1034.
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In recent years, human activities have led to significant CO2 emissions. The increase in energy consumption and emissions of greenhouse gases (mainly CO2) has led to consequences such as global warming and an accelerated rate of glacial melting, making global environmental development more challenging. Even though the monoethanolamine (MEA) method of capturing carbon dioxide is now widely used in industry, the disadvantages of this method still exist, mainly because of the difficult economic balance. Since CO2 is inevitable due to human activities, converting the generated CO2 into high-value clean energy to alleviate the greenhouse effect is a current research hotspot. Therefore, finding a perfect method for capturing CO2 from industrial and commercial operations as soon as possible is certainly a high priority. This paper provides an overview of the basic principles and practical applications of physical and chemical methods of CO2 capture and biochemical technology in the conversion of the captured CO2 into value-added products. The paper describes the current status and challenges faced in the application of carbon capture and storage (CCS) technology worldwide, and finally shows the advantages and prospects of each method. This will lead to the development of a new carbon economy with commercial value, which in turn will facilitate the implementation of CCS on a global scale, ultimately leading to the goal of global carbon neutrality.
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Paik, Inkwan, i Seunguk Na. "Comparison of Carbon Dioxide Emissions of the Ordinary Reinforced Concrete Slab and the Voided Slab System During the Construction Phase: A Case Study of a Residential Building in South Korea". Sustainability 11, nr 13 (28.06.2019): 3571. http://dx.doi.org/10.3390/su11133571.
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The construction industry not only consumes a lot of energy but also emits large volumes of carbon dioxide. Most countries have established target reduction values of the carbon dioxide emissions to alleviate environmental burdens and promote sustainable development. The reduction in carbon dioxide emissions in the construction industry has been taking place in various ways as buildings produce large quantities of the carbon dioxide over their construction life cycle. The aim of this study is to assess and compare the carbon dioxide emissions of an ordinary reinforced concrete slab and the voided slab system applied to a case study involving a commercial-residential complex building in South Korea. Process-based life-cycle assessment (LCA) is adopted to compute the carbon dioxide emissions during the construction phase, which includes all processes from material production to the end of construction. The results indicate that the total CO2 emissions are 257,230 and 218,800 kg CO2 for the ordinary reinforced concrete slab and the voided slab system, respectively. The highest contributor to CO2 reduction is the embodied carbon dioxide emissions of the building materials, which accounts for 34,966 kg CO2. The second highest contributor is the transportation of the building materials, accounting for 3417 kg CO2.
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Dodevski, Vladimir, Bojan Jankovic, Miljana Mirkovic, Milan Kragovic, Ivana Radovic, Filip Veljkovic i Marija Stojmenovic. "Carbon dioxide activation of the plane tree seeds derived bio-char: Kinetic properties and application". Thermal Science 24, nr 6 Part A (2020): 3807–21. http://dx.doi.org/10.2298/tsci190913064d.
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Goal of this work is to establish technical feasibility and fundamentals of producing activated carbon from plane tree seeds biomass for porous materials derivation. Bio-chars produced via carbonization from plane tree seeds precursor were activated in CO2 at 750 and 850?C, during various residence times. Their surface area and porosity were characterized by N2 adsorption at 77 K. Surface areas of activated carbons can be correlated with kinetics mechanism and activation energy magnitudes of oxidation reaction by CO2, which are closely related to applied activation temperature. Result showed that high temperature activated carbon had higher gas adsorption as compared to activated carbon obtained from lower temperature during two-hour residence time. Breakthrough behavior was detected at 850?C where surface reactions dominate, and it is characterized by autocatalytic kinetic model under designed conditions. Both, temperature and CO2 concentration in vicinity of solid surface effect on breakthrough time of adsorbent. Derived bio-chars are converted into high quality activated carbons, with surface area of 776.55 m2/g, where micro-pores with pore diameters less than 2 nm prevail. Produced activated carbons have properties comparable with commercially available activated carbons, which can be successfully used for removal of harmful gaseous pollutants toward air purification.
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Zou, Shaohui, i Tian Zhang. "CO2 Emissions, Energy Consumption, and Economic Growth Nexus: Evidence from 30 Provinces in China". Mathematical Problems in Engineering 2020 (30.11.2020): 1–10. http://dx.doi.org/10.1155/2020/8842770.
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Under the situation of global low-carbon development, the contradiction among energy consumption, economic growth, and CO2 emissions is increasingly prominent. Considering the possible two-way feedback among the three, based on the panel data of 30 regions in China from 2000 to 2017, this paper establishes a spatial Durbin model including economic growth, energy consumption equation, and CO2 emissions and studies the dynamic relationship and spatial spillover among economic growth, energy consumption, and CO2 emissions effects. The results show that the economic growth can significantly improve carbon dioxide emissions, and China’s economic growth level has become a positive driving force for carbon dioxide emissions. However, economic growth will not be significantly affected by the reduction of carbon dioxide emissions. There is a two-way relationship between energy consumption (ENC) and carbon dioxide emissions (CO2). Energy consumption and carbon emissions are interrelated, which has a negative spatial spillover effect on the carbon dioxide emissions of the surrounding provinces and cities.
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Zhu, Ge. "Investigating the steel–cement interface in high-temperature, high-pressure carbon dioxide environments". Materials Science-Poland 41, nr 4 (1.12.2023): 57–67. http://dx.doi.org/10.2478/msp-2023-0045.
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Abstract This study investigates the impact of high-temperature, high-pressure carbon dioxide on the steel-cement interface, crucial in engineering structures and carbon capture storage systems. Experiments conducted on N80 steel and ordinary portland cement in synthetic aquifer brine revealed that CO2 exposure significantly exacerbates steel corrosion and cement degradation. The corrosion current density of steel increased to 1.2 μA/cm2 after six months in CO2, compared to 0.3 μA/cm2 in unexposed samples. Cement samples showed a marked decline in mechanical properties, with hardness reducing from 1.25 GPa (giga-Pascal) in control samples to 0.65 GPa after six months. The steel—cement interface integrity also diminished, as evidenced by a decrease in acoustic impedance from 45.0 M-Rayl to 34.0 M-Rayl over six months. These results emphasize the need for advanced materials and strategies to enhance the durability and safety of structures in CO2-rich environments.
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Mamedova, M. T. "EFFECT OF CARBON DIOXIDE ON OXIDATIVE ETHYLBENZENE DEHYDROGENATION IN THE PRESENCE OF ALUMINUM-CHROMIUM CATALYSTS". Azerbaijan Chemical Journal, nr 2 (29.06.2021): 69–79. http://dx.doi.org/10.32737/0005-2531-2021-2-69-79.
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In order to create a more efficient process for the production of styrene from ethylbenzene by selective oxidation of the resulting hydrogen, model aluminum-chromium catalysts with different modifier (Cu) contents were prepared, and O2, CO2 and a mixture of CO2:air were used as an oxidant. It has been es-tablished that the process of obtaining of styrene from ethylbenzene on alumochromic catalysts is characterized by a high intensity. Alumochromic catalysts modified by Cu and promoted by 15 mass.% K2CO3 in the presence of carbon dioxide increase the conversion of ethylbenzene by 14%, and the selectivity of the formation of styrene by 10% as a result of the transferring dehydrogenation of compaction products to the products of oxidative compaction. The presence of oxygen in the oxidizing mixture CO2:air blocks the participation of carbon dioxide in the selective oxidation of hydrogen isolating at the dehydrogenation of ethylbenzene. It has been established that the most selective alumochromic catalysts in the oxidative dehydrogenation of ethylbenzene to styrene contain 1.5–2.5 mass.% of the modifying component (Cu)
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Islami, Fitrah Sari, Panji Kusuma Prasetyanto i Fitri Kurniasari. "The Effect of Population, GDP, Non-Renewable Energy Consumption and Renewable Energy Consumption on Carbon Dioxide Emissions in G-20 Member Countries". International Journal of Energy Economics and Policy 12, nr 2 (20.03.2022): 103–10. http://dx.doi.org/10.32479/ijeep.12548.
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The purpose of this study is to analyze the effect of population, Gross Domestic Product (GDP), consumption of non-renewable energy, and renewable energy on carbon dioxide (CO2) emissions in The G-20 Member Countries 2010-2019. The data used in this study is panel data. The data used in this study is secondary data obtained from the World Bank and BP Statistical Review of World Energy. This study uses panel data regression analysis through the E-views 11 program. The results of the analysis in this study show that (1) the population has a positive and significant effect on carbon dioxide (CO2) emissions in Thhe G-20 Member Countries, (2) Gross Domestic Product ( GDP) has a positive and insignificant effect on carbon dioxide (CO2) emissions in The G-20 Member States, (3) consumption of non-renewable energy has a positive and significant effect on carbon dioxide (CO2) emissions in The G-20 Member States, (4) consumption renewable energy has a negative and significant effect on carbon dioxide (CO2) emissions in The G-20 Member States, (5) Population variables, Gross Domestic Product (GDP), non-renewable energy consumption, and renewable energy consumption together have a significant effect on carbon dioxide (CO2) emissions in The G-20 Member Countries 2010-2019.