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Articoli di riviste sul tema "Flue gases Purification"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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1

Bushmanov, V. M., V. E. Kogut, Ie D. Butovskyi, M. G. Khmelnyuk e A. V. Zimin. "Process modeling of purification of flue gases". Petroleum Science and Technology 36, n. 3 (29 dicembre 2017): 200–207. http://dx.doi.org/10.1080/10916466.2017.1409239.

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2

Herden, H., G. Mayer-Schwinning e G. Boening. "Purification of incinerator flue gases by adsorption". Zeolites 17, n. 5-6 (novembre 1996): 525. http://dx.doi.org/10.1016/0144-2449(96)89009-9.

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3

Marczak-Grzesik, Marta, Stanisław Budzyń, Barbara Tora, Szymon Szufa, Krzysztof Kogut e Piotr Burmistrz. "Low-Cost Organic Adsorbents for Elemental Mercury Removal from Lignite Flue Gas". Energies 14, n. 8 (13 aprile 2021): 2174. http://dx.doi.org/10.3390/en14082174.

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The research presented by the authors in this paper focused on understanding the behavior of mercury during coal combustion and flue gas purification operations. The goal was to determine the flue gas temperature on the mercury emissions limits for the combustion of lignites in the energy sector. The authors examined the process of sorption of mercury from flue gases using fine-grained organic materials. The main objectives of this study were to recommend a low-cost organic adsorbent such as coke dust (CD), corn straw char (CS-400), brominated corn straw char (CS-400-Br), rubber char (RC-600) or granulated rubber char (GRC-600) to efficiently substitute expensive dust-sized activated carbon. The study covered combustion of lignite from a Polish field. The experiment was conducted at temperatures reflecting conditions inside a flue gas purification installation. One of the tested sorbents—tire-derived rubber char that was obtained by pyrolysis—exhibited good potential for Hg0 into Hg2+ oxidation, resulting in enhanced mercury removal from the flue. The char characterization increased elevated bromine content (mercury oxidizing agent) in comparison to the other selected adsorbents. This paper presents the results of laboratory tests of mercury sorption from the flue gases at temperatures of 95, 125, 155 and 185 °C. The average mercury content in Polish lignite was 465 μg·kg−1. The concentration of mercury in flue gases emitted into the atmosphere was 17.8 µg·m−3. The study analyzed five low-cost sorbents with the average achieved efficiency of mercury removal from 18.3% to 96.1% for lignite combustion depending on the flue gas temperature.

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Shepelev, I. I., O. V. Pilyaeva, E. N. Eskova, E. V. Kiryushin e I. S. Stiglits. "Increase in Efficiency of Processes of Purification of Gases of Aluminous Production". Ecology and Industry of Russia 23, n. 11 (13 novembre 2019): 10–14. http://dx.doi.org/10.18412/1816-0395-2019-11-10-14.

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Technical actions for decrease in harmful effects on the surrounding environment from the rotating furnaces of agglomeration of JSC RUSAL Achinskare offered. Additional technical solution on tertiary treatment of flue gases of the furnace of agglomeration in a scrubber electric precipitators and the direction of purified gases on repartition of carbonization of the aluminous shop is developed. the providing decrease in harmful emissions in the atmosphere to the level of maximum-permissible concentration. The carried-out trial tests of the offered technology confirmed that except effective purification of flue gases of furnaces of agglomeration of inorganic dust and carbon dioxide the high extent of decomposition of alyuminatny solution necessary for technology of receiving alumina is provided.

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Hu, Zhongjie, Heng Zhou, Weili Zhang e Shengli Wu. "The Influence of the Porous Structure of Activated Coke for the Treatment of Gases from Coal Combustion on Its Mechanical Strength". Processes 8, n. 8 (28 luglio 2020): 900. http://dx.doi.org/10.3390/pr8080900.

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This study investigated influences of the open/close states of pores and porosity distribution of activated coke on the mechanical strength of common activated coke for the purification of coal-fired flue gas by analyzing pore structure, abrasive resistance, and compression strengths of 9 types of desulfurization and denitration activated cokes. Research conclusions are conducive to disclosing the influences of porosity characteristics of activated coke for the purification of coal-fired flue gas on mechanical strength, decreasing the physical consumption of activated coke in the recycling of flue gas purification systems, and lowering the purification cost of coal-fired flue gas. According to research results, pores in the ranges of 0–2 nm and 2–500 nm of activated coke are further developed after recycling using the coal-fired flue gas purification system, and the average compression strength of activated coke is about 70% of the added fresh activated coke. However, the abrasive resistance of the recycled activated coke which has a smooth surface is higher than that of the fresh activated coke. Open pores are the main cause of reduced compression strength of activated coke. Open pores in the range of 2–500 nm can destroy the compression strength of activated coke the most. The open/close states of pores cause no significant impacts on the abrasive resistance of activated coke, but pores with diameters ranging from 0–2 nm can destroy the abrasive resistance of activated coke most significantly.

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Ul'yanov, Boris, Tat'yana Raskulova e Mihail Fereferov. "THE OFF-GAS PURIFICATION AFTER THE CATALYTIC COMPLEX PREPARATION’S STAGE OF THE ETHYLBENZENE PRODUCTION". Scientific Papers Collection of the Angarsk State Technical University 2018, n. 1 (4 marzo 2020): 51–54. http://dx.doi.org/10.36629/2686-7788-2018-1-51-54.

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7

Nosyrev, M. A., R. B. Komlyashev, S. I. Ilyina e O. V. Kabanov. "Purification of Gas Emissions from Sulfur Dioxide in Industrial Plants". Ecology and Industry of Russia 22, n. 8 (1 agosto 2018): 24–27. http://dx.doi.org/10.18412/1816-0395-2018-8-24-27.

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The possibility of spreading technology for capturing carbon dioxide from the flue gases of industrial enterprises as well as the utilization of sulfur dioxide is considered. A comparison is made between the physicochemical properties of these gases. Based on the experimental data obtained from the capture of sulfur dioxide, it is concluded that this technology can be successfully applied for the utilization of sulfur dioxide from gas emissions from industrial enterprises.

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Ivanova, M. S., M. V. Vishnetskaya, I. Yu Skrepleva e K. O. Tomsky. "Catalytic Purification of Gas Emissions from Carbon Dioxide and Sulfur". Ecology and Industry of Russia 23, n. 1 (15 gennaio 2019): 46–49. http://dx.doi.org/10.18412/1816-0395-2019-1-46-49.

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The optimal parameters of catalytic purification of flue gases from SO2 and CO2 in trifluoroacetic acid solutions are determined. It is shown that flue gas cleaning from carbon dioxide and sulfur dioxide using trifluoroacetic acid solutions as a catalyst is carried out at room temperature and atmospheric pressure with an efficiency of 100%. The process of gas purification from sulfur dioxide and carbon dioxide is carried out in a non-aggressive medium of trifluoroacetic acid (TFA) solutions. The possibility of increasing the absorption capacity of the reaction medium by pumping the exhaust gases through trifluoroacetic acid solutions has been established. At the same time, polluting waste gases — toxic sulfur and carbon oxides — are converted into higher oligomers (oxides), and then, as a result of their interaction with water, present directly in the reaction medium — TFA aqueous solution, into the corresponding acids. The formation of trifluoroacetic acid esters to a lesser extent leads to an increase in the absorptivity of the reaction medium, a reduction in the number of regeneration stages, a simplified separation of by-products, and, consequently, a simplification of their utilization process due to the absence of the need to purify the latter from these esters.

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9

Glazyrin, Sergey, Zhanar Aidymbayeva, Abay Dostiyarov, Mikhail Zhumagulov, Nikolay Zlatov e Velimir Strefanovic. "Study of the possibilities of integrated treatment of flue gases and waste water from coal-fired heat power plants". Thermal Science, n. 00 (2021): 229. http://dx.doi.org/10.2298/tsci210402229g.

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The results of laboratory studies carried out to identify the possibility and effectiveness of technologies for the complex recycling of components of flue gases and wastewater from thermal power plants and industrial boilers are presented. The following factors were investigated: the degree of saturation of water solutions with carbon dioxide, the efficiency of using these solutions for the regeneration of cation exchangers, the properties of regeneration solutions intended for the regeneration of cation exchange filters prepared using components of flue gases obtained from the combustion of organic fuel in the laboratory by saturating water of various compositions, the degree of saturation of condensate and waste water with components of flue gases, as well as the degree of regeneration of cation exchangers with such regeneration solutions. After research in the laboratory, a laboratory installation was created in an industrial environment to determine the properties of solutions obtained from wastewater and flue gases obtained after production processes at a power plant. The technologies were developed for the complex recycling of flue gases and waste water from thermal power plants with the production of carbon dioxide with a purity of 99.9%, technical nitrogen with a purity of 95%, special solutions for the regeneration of cation exchangers in water purification plants of industrial enterprises. The results obtained make it possible to minimize the volume of emissions into the atmosphere and the volume of waste water from thermal power plants

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Gorbatyuk, S. M., P. S. Makarov e M. A. Sukhorukova. "Environmental efficiency of gas purification and ash collection in Russian mining and metallurgical industry". Izvestiya. Ferrous Metallurgy 63, n. 6 (1 luglio 2020): 451–57. http://dx.doi.org/10.17073/0368-0797-2020-6-451-457.

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The problem of reducing emissions of sulfur dioxide from the flue gases of coal-fired TPPs is highly relevant for domestic energy in connection with the annual increase in coal production. This article analyzes statistical data in the field of coal mining, describes the current state in the field of gas purification and ash collection in the mining and metallurgical industry of the Russian Federation. To regulate pollutant emissions by stationary sources in Russia, a system of maximum permissible and temporarily agreed emissions (MPE and ENV) was introduced. The country takes part in international programs aimed at protecting the environment from the harmful effects of human activity. Despite the general dynamics of reducing air pollution in the Russian Federation, emissions from mining and metallurgical enterprises only increase. This is due to deficiencies in the technical condition and operation of dust and gas cleaning equipment at electric power enterprises. The main ones are the moral and physical deterioration of the equipment fleet, the need for reconstruction and modernization of devices. The average degree of flue gas cleaning from ash at Russian TPPs is 95.5 %, which is noticeably less than abroad. Efficiency of the gas treatment plants used does not meet modern environmental requirements. The flue gases at our TPPs are not cleaned from sulfur and nitrogen oxides; there are practically no devices for continuous monitoring of TPP emissions. The article provides the rationale for the transition of enterprises to the best available technologies (BAT) in the field of gas purification. The use of a gas conditioning system allows 30 – 40 % reduction in the amount of funds spent on the construction of electrostatic filters. In recent years, in connection with the advent of new technologies for burning coal, filters for the purification of hot gases made of ceramic materials have been created. We have analyzed the state of gas purification and ash collection in the mining and metallurgical industry of the Russian Federation and its impact on the atmosphere. An assessment of the current state of gas purification equipment at the enterprises was carried out.

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11

Kholodnaya, G., R. Sazonov e D. Ponomarev. "Plasma chemical purification of flue gases using pulsed electron beams". Journal of Physics: Conference Series 1115 (novembre 2018): 022028. http://dx.doi.org/10.1088/1742-6596/1115/2/022028.

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12

van der Vlies, A. W., e J. H. B. te Marvelde. "New Approach to the Emission of Flue Gases Caused by Sludge Incineration in the Netherlands". Water Science and Technology 25, n. 4-5 (1 febbraio 1992): 307–14. http://dx.doi.org/10.2166/wst.1992.0509.

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Recycling of sewage sludge will soon no longer be possible in The Netherlands, or will be possible only to a very limited degree. For that reason, part of the sewage sludge will have to be incinerated. This will happen particularly in those areas where tipping space is very limited. A sludge incineration plant is planned to be built in the town of Dordrecht, with a capacity of 45,000 tonnes dry solids per year. The plant will be subject to the very strict flue gas emission requirements of the Dutch Guideline on Incineration. The Guideline demands a sophisticated flue gas purification procedure.

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13

Khusnutdinova, Elvira, e Larisa Nikolaeva. "Modified sludge-based purification of flue gases produced by thermal power plants". E3S Web of Conferences 216 (2020): 01082. http://dx.doi.org/10.1051/e3sconf/202021601082.

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This paper proposes an adsorption-based method of removing sulfur dioxide from the flue gases produced by the thermal power plant. A power plant waste – chemical water treatment sludge available at Kazan CHPP-1 – was used as an adsorption material. Presented here is the chemical composition of the chemical water treatment sludge for a modified sorption material to be designed therefrom. The new sorp-tion material was trial tested for removal of sulfur dioxide from gases. This resulted in kinetic dependence and adsorption isotherm. The test results were then used to design the adsorber. The economic and envi-ronmental effect of using the chemical water treatment sludge as the sorption material was calculated.

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14

Pitak, Inna, Serhii Briankin, Oleg Pitak e Valery Shaporev. "ANALYSIS OF THE SANITARY PURIFICATION OF GAS EMISSIONS FROM DUST IN THE LIME MANUFACTURE". EUREKA: Physics and Engineering 5 (29 settembre 2017): 65–72. http://dx.doi.org/10.21303/2461-4262.2017.00435.

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Experimental studies have been carried out to study the effect of the location of the blade vortex from the end of the flue (the flow outflow from the flue to the separation chamber) by the value Vjmax and the determination of the optimum cross section where Vjmax is reached, and also the study of the influence of structural changes on the purification efficiency. The dependence of this swirler on the value of the tangential velocity of the gas flow at its exit from the separator is established. The cross-sections of the flue duct in which, after the swirler, the maximum values Vj, Vr are reached, the features of the dust-gas flow in the studied sections are considered. Based on the studies of the hydrodynamic situation during the flow of a rotating flow in the flue after the swirler, the possibilities of agglomeration of dust particles in the investigated zones, as well as the destruction of NOx gas impurities, are analyzed. During the operation of the reconstructed vortex dust collector, qualitative indices are attained, which confirm the expediency of the conducted studies and the expediency of reconstructing the vortex apparatus. It is proved that the installation of the blade vortex enhances the purification efficiency of the dust-gas flow in a vortex dust collector and will allow for a comprehensive purification of the exhaust gases.

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15

Neumann, A., W. Wilsmann e Reinhard Conradt. "Condensation during Flue Gas Cleaning". Advanced Materials Research 39-40 (aprile 2008): 647–52. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.647.

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Nowadays, it is an operational routine to clean the flue gases from glass furnaces to remove noxious air pollutant substances. The established processes are highly effective, however there are failures caused by the condensation of aggressive fluxes inside the large and expensive flue gas filters. To this day, the process control of the flue gas purification equipment is based on empirical data and on experience. Currently available data do not allow to base process design and control on a solid thermodynamic and kinetic foundation. It is the aim of this work to find out under which conditions condensation really takes place. Therefore, first results of collected kinetic data on the condensation from the system Na2O-H2O-SO2-O2-CO2 are shown to estimate the dew points of liquid and solid condensates as a function of flue gas composition and temperature. The measurements are performed in a self-constructed condensation tube. Investigations are particularly focused on the formation of pyrosulfates and bisulfates.

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16

Ivanenko, Olena, Vyacheslav Radovenchyk, Tatyana Overchenko e Іaroslav Radovenchyk. "INTEGRATED USE OF MAGNETITE IN ENVIRONMENTAL PROTECTION MEASURES". ScienceRise, n. 5 (11 novembre 2020): 57–65. http://dx.doi.org/10.21303/2313-8416.2020.001462.

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The object of research: magnetite obtained by using the ferritic method for the purification of iron-containing solutions. Problem to be solved: a comprehensive solution to the problem of using magnetite, obtained as a result of using the ferrite method for purifying iron-containing solutions, as a catalyst for the oxidation of carbon monoxide and its further utilization in the production of building materials. The main scientific results: it has been shown that the magnetite precipitate formed during the processing of pickling solutions by the ferrite method can be used as a cheap, affordable and effective catalyst for the oxidation of carbon monoxide from flue gases of industrial enterprises, the disposal of which after long-term use does not create problems due to its stability and inertness. Field of practical use of research results: the use of the ferrite method in the purification of pickling solutions of metallurgical enterprises provides not only an increase in the efficiency of water purification, but also leads to the introduction of waste-free technology. The decisive factor will be the use of magnetite as sludge of the use of ferrite technology to solve the problem of reducing flue gas emissions from the production of electrodes for the metallurgical industry, which include toxic carbon monoxide. Innovative technology product: waste-free technology for the processing of pickling solutions by the ferrite method with the formation of a product with magnetic and catalytic properties, further processing of which consists in using red lead iron as a pigment in the production of building materials. Scope of the innovative technology product: oxidation of carbon monoxide from industrial flue gases, followed by the use of red lead as a pigment.

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Švedovs, Oskars, Miķelis Dzikēvičs e Vladimirs Kirsanovs. "Methods for Determining the Performance and Efficiency Parameters of the Flue-gas Condenser Sedimentation Tank". Environmental and Climate Technologies 24, n. 2 (1 settembre 2020): 337–47. http://dx.doi.org/10.2478/rtuect-2020-0077.

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AbstractFlue-gas condenser is used for cleaning the flue-gases in the energy sector. In Latvia, fuel consumption in the household sector is high, so it is planned to introduce this technology in this sector. In the research process of flue-gas condenser, the focus is on reactor testing, rather than on the work of the sedimentation tank – part of the system intended for purification of water from captured particulate matter. In order to ensure good sedimentation process efficiency, it is necessary to know which parameters the process depends on. This study mainly describes the parameters affecting the sedimentation process – dependent indicators and the methods for determining them. The main conclusion is that both methods can be used during the research.

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Licki, Janusz, Andrzej Pawelec, Zbigniew Zimek e Sylwia Witman-Zając. "Electron beam treatment of simulated marine diesel exhaust gases". Nukleonika 60, n. 3 (1 settembre 2015): 689–95. http://dx.doi.org/10.1515/nuka-2015-0098.

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Abstract The exhaust gases from marine diesel engines contain high SO2 and NOx concentration. The applicability of the electron beam flue gas treatment technology for purification of marine diesel exhaust gases containing high SO2 and NOx concentration gases was the main goal of this paper. The study was performed in the laboratory plant with NOx concentration up to 1700 ppmv and SO2 concentration up to 1000 ppmv. Such high NOx and SO2 concentrations were observed in the exhaust gases from marine high-power diesel engines fuelled with different heavy fuel oils. In the first part of study the simulated exhaust gases were irradiated by the electron beam from accelerator. The simultaneous removal of SO2 and NOx were obtained and their removal efficiencies strongly depend on irradiation dose and inlet NOx concentration. For NOx concentrations above 800 ppmv low removal efficiencies were obtained even if applied high doses. In the second part of study the irradiated gases were directed to the seawater scrubber for further purification. The scrubbing process enhances removal efficiencies of both pollutants. The SO2 removal efficiencies above 98.5% were obtained with irradiation dose greater than 5.3 kGy. For inlet NOx concentrations of 1700 ppmv the NOx removal efficiency about 51% was obtained with dose greater than 8.8 kGy. Methods for further increase of NOx removal efficiency are presented in the paper.

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MATSUURA, Shigeharu, e Takehiko INADA. "Flue Gas Purification for MSW Incinerations. Removal Technologies for Noxious Gases Controlled by Regulations." Waste Management Research 2, n. 4 (1991): 318–30. http://dx.doi.org/10.3985/wmr.2.318.

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Samarskaya, N., E. Lysova, O. Paramonova e N. Yudina. "Ensuring the Environmental Safety of Coal-fired Power Plants for the Flue Gases Purification". IOP Conference Series: Earth and Environmental Science 459 (15 aprile 2020): 022074. http://dx.doi.org/10.1088/1755-1315/459/2/022074.

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Kumar R, Dr Suresh, Raakesh M, Shanketh S, Thaaranidevi C. K e Udhayakumar S. "A REVIEW ON PURIFICATION OF FLUE GASES BY USING BOTH VENTURI SCRUBBER AND CYCLONE SEPARATOR". International Journal of Engineering Applied Sciences and Technology 04, n. 11 (30 aprile 2020): 167–78. http://dx.doi.org/10.33564/ijeast.2020.v04i11.030.

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Vanin, G. V., A. S. Noskov, G. Ya Popova, T. V. Andrushkevich e Yu Sh Matros. "The industrial plant for unsteady state purification of flue-gases from acrylonitrile and cyanic acid". Catalysis Today 17, n. 1-2 (maggio 1993): 251–59. http://dx.doi.org/10.1016/0920-5861(93)80029-z.

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Efremov, Anton N., e Aleksey A. Dudolin. "Analysis of Foreign Experience in Using Flue Gas Purification Systems at Waste-to-Energy Plants". Vestnik MEI 2, n. 2 (2021): 11–19. http://dx.doi.org/10.24160/1993-6982-2021-2-11-19.

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The existing method for selecting the structure of a power plant for thermally recycling municipal solid waste (MSW) in the Russian Federation does not address the matter of selecting all components of an energy complex operating on MSW, but places focus on determining the best accessible waste thermal neutralization technology. This generates the need to search for new methods and to select criteria of choosing the structure for each particular project. A comparative analysis of various structural schemes of waste-to-energy plants widely used outside of Russia will make it possible to reveal their main advantages and drawbacks, and to determine their application fields. The article describes the statistical indicators characterizing the operation of the flue gas purification system from acid gases, which can be applied in performing a feasibility study, intellectual property assessment, and in carrying out front-end engineering. For waste-to-energy plants constructed in an urban environment and aimed to operate with keeping to a minimum the gross emissions of acid gases into the atmospheric air, the use of a wet reactor system is recommended, which will ensure low emissions of HF, HCl, and SOx. The system with a wet reactor will make it possible to reduce gross emissions of harmful substances during the operation of large capacity waste-to-energy power plants and will be a justified choice in such case. In constructing medium capacity waste-to-energy plants (with a throughput of up to 350 000 t of MSW per annum), semi-dry and dry reactors can be used; for such plants, the technology involving the use of a semi-dry reactor is the most preferred one.

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Świątek, Łukasz. "Catalytic purification of flue gases from small capacity boilers Katalityczne oczyszczanie spalin z kotłów małej mocy". PRZEMYSŁ CHEMICZNY 1, n. 8 (5 agosto 2016): 208–11. http://dx.doi.org/10.15199/62.2016.8.44.

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Xue, Cailong, Wenming Hao, Wenping Cheng, Jinghong Ma e Ruifeng Li. "CO Adsorption Performance of CuCl/Activated Carbon by Simultaneous Reduction–Dispersion of Mixed Cu(II) Salts". Materials 12, n. 10 (16 maggio 2019): 1605. http://dx.doi.org/10.3390/ma12101605.

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CO is a toxic gas discharged as a byproduct in tail gases from different industrial flue gases, which needs to be taken care of urgently. In this study, a CuCl/AC adsorbent was made by a facile route of physically mixing CuCl2 and Cu(HCOO)2 powder with activated carbon (AC), followed by heating at 533 K under vacuum. The samples were characterized by X-ray powder diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), N2 adsorption/desorption, and scanning electron microscopy (SEM). It was shown that Cu(II) can be completely reduced to Cu(I), and the monolayer dispersion threshold of CuCl on AC support is 4 mmol·g−1 AC. The adsorption isotherms of CO, CO2, CH4, and N2 on CuCl/AC adsorbents were measured by the volumetric method, and the CO/CO2, CO/CH4, and CO/N2 selectivities of the adsorbents were predicted using ideal adsorbed solution theory (IAST). The obtained adsorbent displayed a high CO adsorption capacity, high CO/N2, CO/CH4, and CO/CO2 selectivities, excellent ad/desorption cycle performance, rapid adsorption rate, and appropriate isosteric heat of adsorption, which made it a promising adsorbent for CO separation and purification.

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Kulish, O. N., K. I. Zaporozhskiy, S. A. Kuzhevatov, M. N. Orlova, V. M. Senyavin e I. Sh Gleyzer. "Reducing the Formation of Secondary Pollutants in the Process of NonCatalytic Purification of Flue Gases from Nitrogen Oxides". Ecology and Industry of Russia 24, n. 7 (15 luglio 2020): 8–11. http://dx.doi.org/10.18412/1816-0395-2020-7-8-11.

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The possibilities of the technology of non-catalytic reduction of nitrogen oxides (SNCR) to reduce the possible formation of secondary pollutants: ammonia, carbon monoxide and nitric oxide (I) are considered. The conditions for the process of reduction of nitrogen oxides by the thermal decomposition products of urea with a minimum formation of the above pollutants are determined.

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Balandina, O. A., S. M. Puring, D. N. Vatuzov e E. B. Filatova. "On the question of increasing the purification efficiency of flue gases from the boiler unit of HEPS Volzhsky automobile plant". IOP Conference Series: Materials Science and Engineering 1083, n. 1 (1 febbraio 2021): 012078. http://dx.doi.org/10.1088/1757-899x/1083/1/012078.

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Laribi, Sinda, Lionel Dubois, Marie-Eve Duprez, Guy De Weireld e Diane Thomas. "Simulation of the Sour-Compression Unit (SCU) process for CO2 purification applied to flue gases coming from oxy-combustion cement industries". Computers & Chemical Engineering 121 (febbraio 2019): 523–39. http://dx.doi.org/10.1016/j.compchemeng.2018.11.010.

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Laribi, Sinda, Lionel Dubois, Guy De Weireld e Diane Thomas. "Optimization of the Sour Compression Unit (SCU) process for CO2 Purification Applied to Flue Gases Coming from Oxy-combustion Cement Industries". Energy Procedia 114 (luglio 2017): 458–70. http://dx.doi.org/10.1016/j.egypro.2017.03.1188.

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Martynova, A. Yu, O. S. Malysh, V. A. Saraeva e I. N. Palval. "ORGANOSULFUR COMPOUNDS OF COKE OVEN GAS AND THEIR CONTRIBUTION TO EMISSIONS OF SULFUR DIOXIDE FROM THE SMOKESTACKS OF COKE BATTERIES". Journal of Coal Chemistry 6 (2020): 12–17. http://dx.doi.org/10.31081/1681-309x-2020-0-6-12-17.

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Abstract (sommario):

The article touches upon the problem of cleaning of the coke oven gas from sulfur compounds, which is relevant in connection with the requirements for reducing of the sulfur dioxide emissions into the atmosphere and ensuring of the environmental safety of production in general. At present, the sulfur dioxide emissions from coke-chemical plants account for about 20 % of the total emissions of pollutants from coke ovens and are calculated from the concentration of hydrogen sulfide in coke oven gas after its purification before feeding to coke oven batteries heating systems. However, in addition to hydrogen sulfide, coke oven gas also contains organosulfur compounds such as carbon disulfide (CS2), carbon oxysulfide (COS), thiophene (C4H4S), mercaptans, etc. The authors of the article carried out a study to determine the content of organic sulfur compounds in the original and purified coke oven gas, as well as the contribution of these substances to sulfur dioxide emissions from the smokestacs of coke oven batteries. The calculation has been performed of the additional volume of sulfur dioxide, which is formed due to the combustion of organosulfur compounds of coke oven gas during its combustion in the heating system of coke ovens. It has been found that under the condition of complete conversion of organic sulfur compounds into sulfur dioxide during the combustion of coke oven gas in the heating system of coke ovens, the concentration of sulfur dioxide in flue gases can be approximately 25.0-35.0 mg/m3 (in recount on 5 % oxygen content in flue gases). It has been also shown that the share of emissions of the sulfur dioxide formed as a result of the combustion of hydrogen sulfide in coke oven gas is 90-95 %, and that formed as a result of combustion of the organic sulfur compounds is 5-10 %, even if they are completely transformed into the sulfur dioxide. It has been concluded that it is legitimate to calculate the volume of sulfur dioxide emissions based on the concentration of hydrogen sulfide in purified coke oven gas, supplied as an energy carrier to the heating system of coke ovens.

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Ahlström-Silversand, A. F., e C. U. Ingemar Odenbrand. "Thermally sprayed wire-mesh catalysts for the purification of flue gases from small-scale combustion of bio-fuel Catalyst preparation and activity studies". Applied Catalysis A: General 153, n. 1-2 (maggio 1997): 177–201. http://dx.doi.org/10.1016/s0926-860x(96)00329-8.

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32

Pajdak, Anna. "Purification of flue gases from combustion of solid fuels with sodium sorbents Oczyszczanie gaz�w ze spalania paliw sta�ych z SO2 sorbentami sodowymi". PRZEMYS� CHEMICZNY 1, n. 3 (5 marzo 2015): 160–64. http://dx.doi.org/10.15199/62.2015.3.25.

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33

Shabanov, A. V., D. V. Kondratiev, V. K. Vanin e A. Yu Dunin. "The issue of improving the efficiency of nitrogen oxide neutralization systems in diesel internal combustion engines". Izvestia MGTU MAMI 1, n. 2 (2021): 101–12. http://dx.doi.org/10.31992/2074-0530-2021-48-2-101-112.

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The most effective method of reducing nitrogen oxides in diesel exhaust gas is selective purifica-tion by the SCR-NH3 method. The method uses ammonia released during thermolysis and hydroly-sis of a urea solution when it is injected through a nozzle into a neutralizer. This method has a rela-tively low efficiency of cleaning the exhaust gas from nitrogen oxides. The main factor hindering the achievement of high efficiency of the NOx neutralization system is the insufficiently high tem-perature during the implementation of this process. The article analyzes various ways to increase the efficiency of the neutralization process and proposes a new method for neutralizing NOx by using urea injection into the cylinders of the inter-nal combustion engine at the expansion stroke in a diesel internal combustion engine. Efficiency can be achieved due to a higher exhaust gas temperature in the cylinder of the internal combustion engine and an increase in the time of the process of thermolysis and hydrolysis of urea. The kinetics of the decomposition of nitrogen oxides, the process of NH3 oxidation, and the cal-culation of temperature conditions in the cylinder of a diesel internal combustion engine at the ex-haust cycle are considered. The experience of neutralization of NOx contained in the flue gases of thermal power plants, where NOx purification takes place at high temperatures without the use of a catalyst, is analyzed. It is shown that the modernization of the SCR-NH3 process, due to the injection of urea at the exhaust stroke in a diesel internal combustion engine, will simplify the existing method of NOx neutralization and at the same time obtain additional advantages for a modern high-speed engine

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Urbanas, Davyd, Pranas Baltrėnas, Saeed Saedy, Aristeidis Goulas e J. Ruud van Ommen. "Novel Catalysts for Selective Catalytic Reduction of NOx by NH3 Prepared by Atomic Layer Deposition of V and Ti Oxides on SiO2 Powder". Materials Proceedings 2, n. 1 (7 maggio 2020): 33. http://dx.doi.org/10.3390/ciwc2020-06814.

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Abstract (sommario):

Based on the 2019 report of the European Environment Agency on Air Quality in Europe nitrogen oxides (NOx) were identified as the most harmful air pollutants in terms of damage to ecosystems. Moreover, in Europe, NO2 is pinpointed as one of the most dangerous pollutants for human health. Anthropogenic emissions of NOx are mainly generated by the combustion of fossil fuels. Nitrogen oxides being emitted into the atmosphere cause environmental problems such as acid rain, acidification of soil, lakes and rivers, eutrophication and photochemical smog. The most effective and widely applicable technology to date for the purification of flue gases from NOx is selective catalytic reduction using ammonia (NH3-SCR de-NOx). Nowadays, one of the most significant research fields in NH3-SCR de-NOx is the application of unconventional reduction methods and the preparation of novel catalysts possessing high specific surface area, uniformity, dispersion of active sites, activity and selectivity. Atomic layer deposition (ALD) is an attractive technique for the deposition of uniformly distributed active catalytic layers, or nanoparticles, on highly porous substrates characterized by a complex structure. For this type of materials, conventional catalyst preparation methods (e.g., impregnation or deposition precipitation) can encounter several limitations. The significant advantage of ALD for the preparation of supported catalysts is that the process can be controlled on the atomic scale, providing the required thickness of an active layer, synthesized with a sub-nm accuracy. Moreover, ALD ensures the formation of catalytic sites from the gas phase, which enhances the possibility of active species being deposited inside pores which are very small in size. In this study, ALD was applied to the preparation of VxOy-based NH3-SCR de-NOx catalysts. Highly porous silica gel powder (63–100 μm) with a specific surface area of up to 450 m2·g−1 was used as a substrate for VxOy/SiO2 with different metal loadings (wt.%). In addition (VxOy+TiO2)/SiO2 catalysts were prepared by applying vanadium (V) tri-i-propoxy oxide (VTIP) and titanium tetrachloride (TiCl4) as precursors with deionized water as the co-reactant. Elemental analysis (ICP-OES) revealed that vanadium loadings of the VxOy/SiO2 catalysts were 0.3, 0.7, 1.1 and 1.60 wt.%, while the loadings in the TiO2-promoted VxOy/SiO2 catalyst were 1.0 and 0.2 wt.% for V and Ti, respectively. The obtained XPS spectra indicated the presence of V2O3 and V2O5 species (V2O5/V2O3 ratio was 1.6 and 6.3 for the as-synthesized and calcined samples respectively). Vanadium(V) oxide is known to be a catalytically active compound for NH3-SCR de-NOx. Additionally, TEM, XRD and N2 adsorption (BET) analyses were conducted to provide a comprehensive characterization of the species size, crystalline phase and porosity of the catalysts prepared.

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"Purification of flue gases and exhaust gases". Zeolites 14, n. 2 (febbraio 1994): 155. http://dx.doi.org/10.1016/0144-2449(94)90020-5.

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36

Lu, Hong, Luke Schideman, Qing Ye e Yongqi Lu. "High-efficiency catalytic reduction of residual oxygen for purification of carbon dioxide streams from high-pressure oxy-combustion systems". Reaction Chemistry & Engineering, 2021. http://dx.doi.org/10.1039/d0re00481b.

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Cobalt–manganese composite catalysts in a reverse-flow fixed-bed reactor showed excellent activity and selectivity for reduction of residual O2 for CO2 purification from pressurized oxy-combustion flue gases.

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37

"95/05044 Reduction of waste gases without flue gas purification at thermal power plants (USA experience)". Fuel and Energy Abstracts 36, n. 5 (settembre 1995): 356. http://dx.doi.org/10.1016/0140-6701(95)96804-l.

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38

"95/05240 Activated coke technology for purification of flue gases from waste and hazardous waste combustion installations". Fuel and Energy Abstracts 36, n. 5 (settembre 1995): 367. http://dx.doi.org/10.1016/0140-6701(95)96977-k.

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