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Dion, Louis-Martin. "Biomass gasification for carbon dioxide enrichment in greenhouses". Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103689.
Pełny tekst źródłaLe chauffage à la biomasse résiduelle est utilisé de plus en plus par l'industrie serricole afin de réduire les coûts d'opérations et les impacts environnementaux. L'objectif de cette recherche était d'examiner la possibilité d'utiliser le dioxyde de carbone (CO2) des gaz d'échappement d'un système de chauffage à la biomasse afin d'enrichir les serres en CO2 et favoriser le rendement des cultures. Par rapport à la combustion directe, la gazéification de la biomasse offrent un meilleur contrôle qui permet de réduire les émissions atmosphériques. La gazéification est une réaction thermochimique qui convertit la biomasse solide en un combustible gazeux, le syngas. Des expériences ont été réalisées à l'Université McGill (Montréal, QC, Canada) pour étudier les performances d'un gazogène à courant descendant, alimenté avec des granules de sciure de bois. Les données de température et de pression ont fourni des informations sur les températures de gazéification optimale, le niveau de combustible dans le réacteur, les besoins d'agitation de la grille de cendre, la détection de micro-explosions et les chutes de pression au travers du lit de charbon du réacteur et du filtre au charbon. Le gazogène a fonctionné avec un ratio d'équivalence (i.e. le ratio réel par rapport au ratio stoichiométrique d'air et de combustible) moyen de 0.17, inférieur à la valeur optimale de 0.25, et une efficacité de 59%. La combustion du syngas a produit une moyenne de 8.8 ppm de monoxyde de carbone (CO), où 60% des essais ont respecté les normes de qualité de l'air, et 90% ont été en dessous de 20 ppm. Le dioxyde de soufre (SO2) a été indétectable à une résolution en ppm, et les émissions d'éthylène (C2H4) ont été inférieures à la concentration critique de 50 ppb pour l'enrichissement au CO2. La moyenne d'oxydes d'azote (NOx) a été de 23.6 ppm et devrait être réduite pour des opérations commerciales. Le gazogène alimenté aux granules de bois, avec une consommation de 7.7 kg/hr, pourrait fournir 22.9 kW d'énergie thermique et enrichir une serre d'une surface de 1540 m2. Les résultats indiquent que la gazéification de biomasse, couplée à la combustion de syngas, est une alternative prometteuse au propane et au gaz naturel pour l'enrichissement des serres au CO2, puisque davantage de CO2 par unité d'énergie est fournie et ce, à partir d'un combustible renouvelable.
Ghannoum, Oula, of Western Sydney Hawkesbury University, Faculty of Agriculture and Horticulture i School of Horticulture. "Responses of C3 and C4 Panicum grasses to CO2 enrichment". THESIS_FAH_HOR_Ghannoum_O.xml, 1997. http://handle.uws.edu.au:8081/1959.7/139.
Pełny tekst źródłaDoctor of Philosophy (PhD)
Dezi, Silvia <1974>. "Modelling the effects of nitrogen deposition and carbon dioxide enrichment on forest carbon balance". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3362/1/dezi_silvia_tesi.pdf.
Pełny tekst źródłaDezi, Silvia <1974>. "Modelling the effects of nitrogen deposition and carbon dioxide enrichment on forest carbon balance". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3362/.
Pełny tekst źródłaLiu, Hung-Tsu (Paul). "Physiological limitations to the growth response of bean plants (Phaseolus vulgaris L.) to carbon dioxide enrichment". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30915.
Pełny tekst źródłaLand and Food Systems, Faculty of
Graduate
Ghannoum, Oula. "Responses of C3 and C4 Panicum grasses to CO2 enrichment". Thesis, View thesis View thesis, 1997. http://handle.uws.edu.au:8081/1959.7/139.
Pełny tekst źródłaLukac, Martin. "Effects of atmospheric COâ†2 enrichment on root processes and mycorrhizal functioning in short rotation intensive poplar plantation". Thesis, Bangor University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391756.
Pełny tekst źródłaBray, Shirley M. "The interaction between carbon dioxide enrichment and salinity on growth and carbon partitioning in Phaseolus vulgaris L". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0018/NQ54822.pdf.
Pełny tekst źródłaEdwards, Diane Roselyn. "Towards a plant-based method of guiding CO₂ enrichment in greenhouse tomato". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/3328.
Pełny tekst źródłaNewbery, R. M. "Influence of CO₂ enrichment on the growth and nutritional status of Agrostis capillaris and Calluna". Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240455.
Pełny tekst źródłaGiuntoli, Alberto. "Increased carbon dioxide concentration affects photoinhibition of photosynthesis in wheat and grapevine in the field". Thesis, University of Essex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327070.
Pełny tekst źródłaSpringer, Clint J. "Estimating net photosynthesis and productivity of a loblolly pine forest grown with carbon dioxide enrichment". Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3584.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains ix, 113 p. : ill. Vita. Includes abstract. Includes bibliographical references.
Bachman, Sarah. "Elevated atmospheric carbon dioxide and precipitation alter ecosystem carbon fluxes over northern mixed-grass prairie at the prairie heating and CO2 enrichment (PHACE) experiment in Cheyenne, Wyoming, USA". Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1445355711&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Pełny tekst źródłaScholefield, Paul Anthony. "Effects of long-term carbon dioxide enrichment on the emission of isoprene from selected plant species". Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288942.
Pełny tekst źródłaAldarmaki, Naeema Ibrahim Karam Al-Darmaki. "Extraction and enrichment of minor lipid components of palm fatty acid distillate using supercritical carbon dioxide". Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3621/.
Pełny tekst źródłaButler, G. D., B. A. Kimball i J. R. Mauney. "Populations of the Sweetpotato Whitefly on Cotton Grown in Open-Top Field Carbon Dioxide-Enrichment Chambers". College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204054.
Pełny tekst źródłaWees, David. "The effects of carbon dioxide enrichment and aeration of hydroponic nutrient solutions on the growth and yield of lettuce /". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66169.
Pełny tekst źródłaPolastrini, Elisa. "Enrichment of CO2 in marine ecosystem: effects on marine bivalve Chamelea gallina". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Znajdź pełny tekst źródłaIost, Regiane [UNESP]. "Problemas fitossanitários e crescimento de duas cultivares de café durante o primeiro ano em experimento FACE (“Free Air Carbon Dioxide Enrichment”)". Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/97248.
Pełny tekst źródłaO clima do planeta vem se alterando gradativamente nas últimas décadas em consequência da intensificação das atividades antrópicas, como a queima de combustíveis fósseis e mudanças no uso da terra, que são responsáveis por alterações em diversos componentes do ambiente, como o dióxido de carbono (CO₂), o ozônio (O3) e a radiação ultravioleta-B (UV-B). Considerando que o CO2 é o gás de efeito estufa que tem maior destaque devido ao maior volume de emissões, os efeitos do aumento da concentração de CO₂ do ar (duas condições: ambiente e elevada em relação à concentração de CO₂ do ar) foram avaliados sobre os problemas fitossanitários e o crescimento de plantas jovens de café em duas cultivares (Catuaí Vermelho IAC 144 e Obatã IAC 1669-20) durante o primeiro ano de injeção do gás em FACE (“Free Air Carbon Dioxide Enrichment”). O experimento foi realizado no campo experimental da Embrapa Meio Ambiente, em Jaguariúna, (latitude 22°71’90’’S, longitude 47°02’10’’W, altitude de 570 m), sendo composto por 12 parcelas octogonais com laterais de quatro metros e 10 metros de diâmetro. A injeção de CO2 é feita no período diurno, das 7 às 17h, em seis parcelas por meio de bicos injetores localizados nos lados das parcelas a 0,5m de altura do solo. A injeção só é feita com ventos entre 0,5 e 4,5 m/s controlada por meio de válvulas. O monitoramento e o controle do sistema são realizados por uma rede de comunicação sem fio. O aumento da concentração de CO2 do ar não teve efeito sobre o crescimento das plantas jovens de café para as duas cultivares para as variáveis: número total de folhas, número total de ramos e diâmetro do colo. Apenas o número total de nós e a altura das plantas apresentaram diferenças significativas quanto...
The earth's climate has been changing gradually over the last decades as a result of the intensification of human activities such as burning fossil fuels and changes in land use, which are responsible for changes in various components of the environment, such as carbon dioxide (CO₂), ozone (O3) and ultraviolet B (UV-B). Considering that CO2 is the greenhouse gas that is more prominent due to higher emissions, the effects of increasing the concentration of CO₂ in the air (two conditions: environment and high relative concentration of CO₂ air) were evaluated on the phytosanitary problems and growth young coffee plants in both cultivars (Catuai Vermelho IAC 144 and Obatã IAC 1669-20) during the first year of gas injection in FACE (Free Air Carbon Dioxide Enrichment). The experiment was conducted at the experimental field of Embrapa Environment in Jaguariuna, (latitude 22°71'90'' S, longitude 47°02'10''W, altitude 570 m), comprising 12 plots octagonal side four meters and 10 meters in diameter. The CO2 injection is made during the day, from 7 to 17h, in six installments through nozzles located on the sides of the plots at 0.5 m height from the ground. The injection is made only with winds between 0.5 and 4.5 m/s controlled by valves. The monitoring and control system are realized by a network of wireless communication... (Complete abstract click electronic access below)
Iost, Regiane 1983. "Problemas fitossanitários e crescimento de duas cultivares de café durante o primeiro ano em experimento FACE ("Free Air Carbon Dioxide Enrichment") /". Botucatu, 2013. http://hdl.handle.net/11449/97248.
Pełny tekst źródłaBanca: Antonio Carlos Maringoni
Banca: Flávia Rodrigues Alves Patrício
Resumo: O clima do planeta vem se alterando gradativamente nas últimas décadas em consequência da intensificação das atividades antrópicas, como a queima de combustíveis fósseis e mudanças no uso da terra, que são responsáveis por alterações em diversos componentes do ambiente, como o dióxido de carbono (CO₂), o ozônio (O3) e a radiação ultravioleta-B (UV-B). Considerando que o CO2 é o gás de efeito estufa que tem maior destaque devido ao maior volume de emissões, os efeitos do aumento da concentração de CO₂ do ar (duas condições: ambiente e elevada em relação à concentração de CO₂ do ar) foram avaliados sobre os problemas fitossanitários e o crescimento de plantas jovens de café em duas cultivares (Catuaí Vermelho IAC 144 e Obatã IAC 1669-20) durante o primeiro ano de injeção do gás em FACE ("Free Air Carbon Dioxide Enrichment"). O experimento foi realizado no campo experimental da Embrapa Meio Ambiente, em Jaguariúna, (latitude 22°71'90''S, longitude 47°02'10''W, altitude de 570 m), sendo composto por 12 parcelas octogonais com laterais de quatro metros e 10 metros de diâmetro. A injeção de CO2 é feita no período diurno, das 7 às 17h, em seis parcelas por meio de bicos injetores localizados nos lados das parcelas a 0,5m de altura do solo. A injeção só é feita com ventos entre 0,5 e 4,5 m/s controlada por meio de válvulas. O monitoramento e o controle do sistema são realizados por uma rede de comunicação sem fio. O aumento da concentração de CO2 do ar não teve efeito sobre o crescimento das plantas jovens de café para as duas cultivares para as variáveis: número total de folhas, número total de ramos e diâmetro do colo. Apenas o número total de nós e a altura das plantas apresentaram diferenças significativas quanto... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The earth's climate has been changing gradually over the last decades as a result of the intensification of human activities such as burning fossil fuels and changes in land use, which are responsible for changes in various components of the environment, such as carbon dioxide (CO₂), ozone (O3) and ultraviolet B (UV-B). Considering that CO2 is the greenhouse gas that is more prominent due to higher emissions, the effects of increasing the concentration of CO₂ in the air (two conditions: environment and high relative concentration of CO₂ air) were evaluated on the phytosanitary problems and growth young coffee plants in both cultivars (Catuai Vermelho IAC 144 and Obatã IAC 1669-20) during the first year of gas injection in FACE ("Free Air Carbon Dioxide Enrichment"). The experiment was conducted at the experimental field of Embrapa Environment in Jaguariuna, (latitude 22°71'90'' S, longitude 47°02'10''W, altitude 570 m), comprising 12 plots octagonal side four meters and 10 meters in diameter. The CO2 injection is made during the day, from 7 to 17h, in six installments through nozzles located on the sides of the plots at 0.5 m height from the ground. The injection is made only with winds between 0.5 and 4.5 m/s controlled by valves. The monitoring and control system are realized by a network of wireless communication... (Complete abstract click electronic access below)
Mestre
Iost, Regiane [UNESP]. "Café arábica em experimento tipo FACE ('Free Air Carbon Dioxide Enrichment'): intensidade da ferrugem e do bicho-mineiro e crescimento da planta". Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151156.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Nas últimas décadas o clima do planeta vem se alterando gradativamente em consequência da mudança climática, devido principalmente, à intensificação das atividades antrópicas, como a queima de combustíveis fósseis e mudanças no uso da terra, as quais são responsáveis por alterações em diversos componentes do ambiente, como o dióxido de carbono (CO₂), o metano, o óxido nitroso e outros gases de efeito estufa. Considerando que o CO2 é o gás de efeito estufa que tem maior importância devido ao maior volume de emissões, os efeitos do enriquecimento do ar com CO₂[duas condições: concentração ambiente (nas faixas 360-450ppm) e concentração enriquecida (entre 490 ppm e 620 ppm)] foram avaliados sobre o desenvolvimento de plantas de café e sobre a ferrugem do cafeeiro e bicho-mineiro na cultivar “Catuaí Vermelho IAC 144” em experimento do tipo FACE (“Free Air Carbon Dioxide Enrichment”). O experimento foi composto por 12 parcelas octogonais com 10 metros de diâmetro, das quais seis foram enriquecidas com CO2 e seis permaneceram na concentração ambiente. As avaliações foram realizadas nos anos de 2013, 2014 e 2015. Para o desenvolvimento da cultura foram avaliadas a altura das plantas, o diâmetro do colo das plantas e o número de folhas nos ramos. Para os problemas fitossanitários foram avaliados a ferrugem do cafeeiro e o bicho-mineiro, ambos por meio da incidência. Em condições de enriquecimento do ar com CO2 a altura das plantas e o diâmetro do caule foram maiores, nos três anos avaliados. Não houve diferença estatística para o número de folhas em todo o período avaliado. A incidência de bicho-mineiro foi maior em condições ambientes, enquanto a incidência da ferrugem do cafeeiro foi semelhante em ambas as condições.
In recent decades the planet's climate has been gradually changing as a result of climate change, mainly due to the intensification of anthropogenic activities, such as the burning of fossil fuels and changes in land use, which are responsible for changes in various components of the environment, such as carbon dioxide (CO2), methane, nitrous oxide and other greenhouse gases. Considering that CO2 is the most important greenhouse gas due to higher emissions, the effects of CO2 enrichment [two conditions: ambient concentration (between 360ppm and 490ppm) and enriched concentration (between 490ppm and 620ppm)] were evaluated on the development of coffee plants and on coffee leaf rust and leaf miner in the "Catuaí Vermelho IAC 144" cultivar in a Free Air Carbon Dioxide Enrichment (FACE) experiment. The experiment was composed of 12 octagonal plots with 10 meters in diameter, of which six were enriched with CO2 and six remained in the ambient concentration. The evaluations were carried out in the years of 2013, 2014 and 2015. For the development of the crop were evaluated height of plants, stem diameter and number of leaves in the branches. For the phytosanitary problems, was evaluated the incidence of coffee leaf rust and leafminer incidence. In CO2 enrichment conditions, plant height and stem diameter were higher in the three years evaluated. There was no statistical difference for the number of leaves throughout the evaluated period. The incidence of leaf miner was higher in environmental conditions, while the incidence of coffee leaf rust was similar in both conditions.
Iost, Regiane 1983. "Café arábica em experimento tipo FACE ('Free Air Carbon Dioxide Enrichment') : intensidade da ferrugem e do bicho-mineiro e crescimento da planta /". Botucatu, 2017. http://hdl.handle.net/11449/151156.
Pełny tekst źródłaCoorientador: Wagner Bettiol
Banca: Edson Luiz Furtado
Banca: Flávia Rodrigues Alves Patrício
Banca: Kátia de Lima Nechet
Banca: Dartanhã José Soares
Resumo: Nas últimas décadas o clima do planeta vem se alterando gradativamente em consequência da mudança climática, devido principalmente, à intensificação das atividades antrópicas, como a queima de combustíveis fósseis e mudanças no uso da terra, as quais são responsáveis por alterações em diversos componentes do ambiente, como o dióxido de carbono (CO₂), o metano, o óxido nitroso e outros gases de efeito estufa. Considerando que o CO2 é o gás de efeito estufa que tem maior importância devido ao maior volume de emissões, os efeitos do enriquecimento do ar com CO₂[duas condições: concentração ambiente (nas faixas 360-450ppm) e concentração enriquecida (entre 490 ppm e 620 ppm)] foram avaliados sobre o desenvolvimento de plantas de café e sobre a ferrugem do cafeeiro e bicho-mineiro na cultivar "Catuaí Vermelho IAC 144" em experimento do tipo FACE ("Free Air Carbon Dioxide Enrichment"). O experimento foi composto por 12 parcelas octogonais com 10 metros de diâmetro, das quais seis foram enriquecidas com CO2 e seis permaneceram na concentração ambiente. As avaliações foram realizadas nos anos de 2013, 2014 e 2015. Para o desenvolvimento da cultura foram avaliadas a altura das plantas, o diâmetro do colo das plantas e o número de folhas nos ramos. Para os problemas fitossanitários foram avaliados a ferrugem do cafeeiro e o bicho-mineiro, ambos por meio da incidência. Em condições de enriquecimento do ar com CO2 a altura das plantas e o diâmetro do caule foram maiore... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: In recent decades the planet's climate has been gradually changing as a result of climate change, mainly due to the intensification of anthropogenic activities, such as the burning of fossil fuels and changes in land use, which are responsible for changes in various components of the environment, such as carbon dioxide (CO2), methane, nitrous oxide and other greenhouse gases. Considering that CO2 is the most important greenhouse gas due to higher emissions, the effects of CO2 enrichment [two conditions: ambient concentration (between 360ppm and 490ppm) and enriched concentration (between 490ppm and 620ppm)] were evaluated on the development of coffee plants and on coffee leaf rust and leaf miner in the "Catuaí Vermelho IAC 144" cultivar in a Free Air Carbon Dioxide Enrichment (FACE) experiment. The experiment was composed of 12 octagonal plots with 10 meters in diameter, of which six were enriched with CO2 and six remained in the ambient concentration. The evaluations were carried out in the years of 2013, 2014 and 2015. For the development of the crop were evaluated height of plants, stem diameter and number of leaves in the branches. For the phytosanitary problems, was evaluated the incidence of coffee leaf rust and leafminer incidence. In CO2 enrichment conditions, plant height and stem diameter were higher in the three years evaluated. There was no statistical difference for the number of leaves throughout the evaluated period. The incidence of leaf miner was higher in environmental conditions, while the incidence of coffee leaf rust was similar in both conditions ...
Doutor
Olsson, Per. "Effects of fertilisation on rhizospheric and heterotrophic soil CO2 efflux in boreal Norway spruce stands /". Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/10064860.pdf.
Pełny tekst źródłaSlaney, Michelle. "Impact of elevated temperature and [CO₂] on spring phenology and photosynthetic recovery of boreal Norway spruce /". Alnarp : Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200603.pdf.
Pełny tekst źródłaLin, Chia-Wei, i 林嘉偉. "Carbon dioxide enrichment PDMS/PSf composite membrane". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cmwuq8.
Pełny tekst źródła中原大學
化學工程研究所
106
After the industrial revolution in the 18th century, due to the extensive factory, greenhouse gases such as carbon dioxide (CO2), methane (CH4), ozone (O3) and nitrogen oxides (NOX) were produced which have caused serious global climate and affect the people’s lives. Therefore, many researchers have used various technologies to capture the greenhouse gases to improve global warming. Food is the most basic factor for human survival. Global warming climate anomalies will reduce agricultural production and create another food crisis that threatens human survival. In recent years, membrane separation technology has received more and more attention. Therefore, we hope to use membrane technology to capture carbon dioxide. Carbon dioxide enriched air is used to promote the photosynthesis of crops to accelerate the growth of crops and shorten the production cycle of crops. Both food shortage and global warming can be solved by carbon dioxide enrichment cultivation. In this study, carbon dioxide-enriched composite membranes were prepared and used in agriculture to supply a large amount of carbon dioxide concentrated air. The carbon dioxide concentration of the original PDMS/PSf composite film is increased. But the efficiency cannot meet the requirements for promoting the growth of crops (CO2 concentration is greater than 800ppm). So we use different methods to modified the composite membrane. The results show that the concentration of carbon dioxide in permeate of the support PSf membrane is about 452 ppm, and the gas flux is about 44320 GPU. After coating PDMS and adjusting the concentration of cross-linking agent, UV/O3 treatment time and heat treatment conditions, the PDMS/PSf composite membrane, the CO2 gas flux decrease to 2336 GPU, but the carbon dioxide concentration increased to 814 ppm. FESEM, FTIR, SEM EDX, XPS, WCA, etc., were used to analyze the PDMS/PSf composite membrane. In the study, the prepared film was actually applied to greenhouse cultivation crops to prove that enriched carbon dioxide air promoted crops. The results of this study show that carbon dioxide enrichment membrane has considerable potential for the growth of crops.
Li, Wan-Hua, i 李婉華. "Carbon dioxide enrichment PEBAX/MOF composite membrane for CO2 separation". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/mj8qyu.
Pełny tekst źródła中原大學
化學研究所
107
In this study, metal organic frameworks (MOFs) with different pore sizes or with different functional groups and poly(ether-block-amide) (Pebax-1657) were used to treat organic metal skeletons through drying-free methods. Mixing to prepare a mixed matrix film (MMM), the different loading ratio of the metal organic frameworks was studied, and the mass percentage was 1 wt% to 30 wt%. The mixed matrix membrane showed an improvement compared with the pure polymer membrane. CO2 permeability and CO2 / N2 selectivity. By processing the metal organic frameworks without drying, the results obtained can be clearly observed. When the loading of ZIF-8 is increased, the selectivity of gas separation is gradually increased, which is 20% higher than the literature. Use other metal organic frameworks such as UiO-66, NH2-UiO-66, MIL-53 (Al), A520, MIL-68 (Al), and MIL-100 (Fe) at 5 wt% loading (based on polymer) The polyether polyamine block copolymer is mixed the metal organic frameworks is processed in a drying-free manner to prepare a mixed matrix membrane, and then the gas separation performance test is performed, and the highest CO2 / N2 separation efficiency is 85.94 obtained by P-UiO-66., permeate flux 189.77 (barrer), higher than the 2008 Robeson’s Upper bound, to obtain a high permeability and high selectivity mixed matrix membrane.
Wu, Chuan-Hsiang, i 吳詮翔. "Ethyl cellulose composite membranes for carbon dioxide separation and oxygen enrichment processes". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/r8d83s.
Pełny tekst źródła國立宜蘭大學
化學工程與材料工程學系碩士班
103
In this study, the oligomer, glycerol propoxylate-block-ethoxylate (GP-b-E) or the amino-modified hollow silica (NH2-HS) with different shaps as the additives were added in the ethyl cellulose (EC) polymer to prepare a series of EC composite membranes. These composite membranes were applied to the gas separation processes. The effects of the concentration of casting solution and the oligomer content on the properties and gas separation performance of membrane were investigated. The effects of the shape, surface amino-modification, and content of hollow silica on the properties and gas separation performance of membrane were also studied in this study. Scanning electron microscope (SEM) was used to observe the morphologies of the membranes and hollow silica. Fourier transform infrared (FTIR) was used to analyze the surface chemical structure of amino-modified hollow silica. Energy Dispersive X-ray spectrometer (EDX) was used to observe the distribution of hollow silica in the membrane. Thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC) were used to analyze the thermal properties of the membranes. Tensile tester (Instron) was used to measure the mechanical properties of the membranes. The gas sorption measurement was carried out by the microbalance to determine the adsorbed amount of gas. In the addition system of GP-b-E oligomer, from the SEM observation, the addition of the GP-b-E oligomer in the EC membrane causes the membrane morphology converts the more closed porous structure to the more connected porous structure. With an increase in the added amount of GP-b-E, connected porous structure in the membrane increased. From the results of the DSC and mechanical property measurements, the addition of the GP-b-E oligomer causes a decrease in the melting point, Young's modulus, and tensile strength and an increase in the elongation. From the results of the gas permeation experiments, the addition of the oligomer having the ether groups in the EC membrane can effectively promote the permeability coefficients of carbon dioxide and oxygen. The EC/GP-b-E composite membrane prepared by the addition content of EC:GP-b-E=1:0.5 (by weight) has the desirable gas separation performance which is the carbon dioxide and oxygen permeability coefficients of 1506.3 barrer and 228.5 barrer and the carbon dioxide/nitrogen and oxygen/nitrogen selectivities of 17.5 and 2.7, respectively. From the analysis of the solution-diffusion mechanism, the gas permeability coefficient and selectivity of the EC/GP-b-E composite membrane are dominated by it’s the gas diffusivity coefficient and diffusivity selectivity. In the addition system of HS and NH2-HS, from the results of SEM observation and FTIR analysis, the amino-modified hollow silica with different shaps was prepared successfully. From the SEM observation and EDX analysis, the spherical NH2-HS can be distributed in the EC membrane uniformly. From the result of mechanical property measurement, the addition of the spherical NH2-HS causes a decreases in Young's modulus, tensile strength and elongation. From the TGA and DSC measurements, the addition of the spherical NH2-HS in the EC membrane enhances the thermal stability of the membrane slightly but decreases the glass transition temperature (Tg) and melting point (Tm). From the results of the gas permeation experiments, the addition of the spherical HS in the EC membrane can effectively promote the permeability coefficients of carbon dioxide and oxygen. The EC/spherical NH2-HS composite membrane prepared by the addition content of EC:spherical NH2-HS=1:0.1 (by weight) has the desirable gas separation performance which is the carbon dioxide and oxygen permeability coefficients of 190.1 barrer and 33.7 barrer and the carbon dioxide/nitrogen and oxygen/nitrogen selectivities of 19.7 and 3.5, respectively.
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