Relevant bibliographies by topics / Coal gasification

Academic literature on the topic 'Coal gasification'

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Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Coal gasification"

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Dhawan, Heena, Rohit Kumar, Sreedevi Upadhyayula, K. K. Pant, and D. K. Sharma. "Fractionation of coal through organo-separative refining for enhancing its potential for the CO2-gasification." International Journal of Coal Science & Technology 7, no. 3 (July 29, 2020): 504–15. http://dx.doi.org/10.1007/s40789-020-00348-7.

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Abstract Coal gasification has already been extensively studied earlier under varying conditions of steam, CO2, O2, inert conditions. Belbaid coal and its e, N and NMP-DETA SCC products recovered through organo-refining under milder ambient pressure conditions were subjected to CO2-gasification in a fixed bed reactor under varying conditions. CO2 being an inert gas becomes the most challenging to be utilized during the gasification process. The SCCs showed better CO2-gasification reactivity than the raw Belbaid coal at 900 °C. The use of the catalyst K2CO3 tremendously increased the gasification reactivity for both raw coal and the SCCs. The use of sugarcane bagasse for CO2-gasification along with raw coal as well as with residual coal was also studied. Gasification under CO2 atmosphere conditions was used to structurally understand the coals as the coal structure gets loosened after extraction.
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Li, Han Xu, Xiang Cao, and Yong Xin Tang. "Study of Effect of Ternary-Component Blended Coal on Coal Gasification Reaction at High Temperature." Applied Mechanics and Materials 295-298 (February 2013): 3104–9. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.3104.

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Three typical Chinese individual coals which existed remarkable difference on coal ash chemical composition and ash fusion temperature were selected to carry out coal blending experiments to study the coal gasification reaction at high temperature by means of using ternary-component blended coal technique and TGA-DTA method. According to ternary-component blended coal with a certain proportion, ash chemical composition and coal-char/CO2 gasification reactivity were analyzed by X-ray fluorescence (XRF) and thermogravimetric analysis-derivative thermogravimetric analysis (TGA-DTG), respectively. The results show that the ash chemical components change because ternary-component blended coals change the mineral composition, and hence, the gasification reactivity can be affected as well. Moreover, in accordance with reactivity index R, it indicates that the order of gasification reactivity of three individual coals and four blended coal options is coal x > option B > option A > option D > option C > coal z >coal y. Meanwhile, a new mathematical model called per unit ash alkali index B* was established by using the ash chemical component dates, which has a good corresponding relationship with R for four blending coal options. Utilizing ternary-component blended coal technique could improve the high-temperature coal ash gasification reaction.
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Zhao, Li Hong, Xi Jie Chu, and Shao Juan Cheng. "Sulfur Transfers from Pyrolysis and Gasification of Coal." Advanced Materials Research 512-515 (May 2012): 2526–30. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2526.

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The sulfur transformation during pyrolysis and gasification of three kinds of coals was studied and the release of H2S and COS during the process was examined. During pyrolysis, besides the property of coal, reaction temperature is the most important factor that affects the sulfur removal. The main sulfur-containing gases is H2S, the ratio of sulfur-containing gases amount to total sulfur amount in coal reaches 25.8% for LS coal, 31.8% for YT coal and 13.1% for HJ coal, respectively. During CO2 gasification, compared with pyrolysis and steam gasification, there are more COS and less H2S formation, because CO could react with sulfide to form COS. During steam gasification, only H2S formation and no COS detected, because H2 has stronger reducibility to form H2S than CO. And the formation rate of sulfur during gasification is consistent with the gasification reactivity of three coal chars, indicated that coal rank is the major factor which affects the sulfur distribution during gasification.
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Kapusta, Krzysztof, Marian Wiatowski, Krzysztof Stańczyk, Renato Zagorščak, and Hywel Rhys Thomas. "Large-scale Experimental Investigations to Evaluate the Feasibility of Producing Methane-Rich Gas (SNG) through Underground Coal Gasification Process. Effect of Coal Rank and Gasification Pressure." Energies 13, no. 6 (March 13, 2020): 1334. http://dx.doi.org/10.3390/en13061334.

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An experimental campaign on the methane-oriented underground coal gasification (UCG) process was carried out in a large-scale laboratory installation. Two different types of coal were used for the oxygen/steam blown experiments, i.e., “Six Feet” semi-anthracite (Wales) and “Wesoła” hard coal (Poland). Four multi-day gasification tests (96 h continuous processes) were conducted in artificially created coal seams under two distinct pressure regimes-20 and 40 bar. The experiments demonstrated that the methane yields are significantly dependent on both the properties of coal (coal rank) and the pressure regime. The average CH4 concentration for “Six Feet” semi-anthracite was 15.8%vol. at 20 bar and 19.1%vol. at 40 bar. During the gasification of “Wesoła” coal, the methane concentrations were 10.9%vol. and 14.8%vol. at 20 and 40 bar, respectively. The “Six Feet” coal gasification was characterized by much higher energy efficiency than gasification of the “Wesoła” coal and for both tested coals, the efficiency increased with gasification pressure. The maximum energy efficiency of 71.6% was obtained for “Six Feet” coal at 40 bar. A positive effect of the increase in gasification pressure on the stabilization of the quantitative parameters of UCG gas was demonstrated.
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Yin, Zhenyong, Hao Xu, Yanpen Chen, and Tiantian Zhao. "Coal char characteristics variation in the gasification process and its influencing factors." Energy Exploration & Exploitation 38, no. 5 (July 27, 2020): 1559–73. http://dx.doi.org/10.1177/0144598720935523.

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Underground coal gasification is a burgeoning coal exploitation technique that coal is directly converted into gaseous fuel by controlled combustion. In this paper, the gasification experiments of Inner Mongolia lignite, Xinjiang subbituminous coal, and Hancheng medium volatile bitumite were conducted respectively by using the tube furnace coal gasification experiment system. The gasification process was conducted under 3°C/min increment within the range of 600–900°C. The gas composition was analyzed by gas chromatography and the pore structure of the coal char was detected by low-temperature N2 adsorption. The results show that the gasification temperature, gasification agent, and coal type have an important influence on the gasification reaction. With the increase of gasification temperature, the effective component, gas calorific value, and gas production rate increase. When CO2 is used as the gasifying agent, the effective components in the gas are mainly CO. When H2O(g) is used as the gasifying agent, the effective component of gas is H2. The coal gasification performance with low thermal maturity is obvious better than the high rank coal with higher coalification. N2 adsorption–desorption experiments show that the pore is mainly composed by transition pore and the micropores, the specific surface area is chiefly controlled by a pore size of 2–3 nm. With the increase of coalification degree, the adsorption amount, specific surface area, and total pore volume show a decreasing trend. The gasifying agent has a great influence on the pore structure of the coal char. The gasification effect of H2O (g) is significantly better than that of CO2. Analyzing the gasification characteristics and pore changes of different coal rank coals under different gasification agents, we found that Inner Mongolia lignite is more conducive to the transport of gasification agents and gaseous products in coal.
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Wiatowski, Marian, Krzysztof Kapusta, Aleksandra Strugała-Wilczek, Krzysztof Stańczyk, Alberto Castro-Muñiz, Fabián Suárez-García, and Juan Ignacio Paredes. "Large-Scale Experimental Simulations of In Situ Coal Gasification in Terms of Process Efficiency and Physicochemical Properties of Process By-Products." Energies 16, no. 11 (May 31, 2023): 4455. http://dx.doi.org/10.3390/en16114455.

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This paper presents a series of surface experiments simulating underground coal gasification (UCG). The main goal of the experiments was to investigate the influence of the gasification medium and the coal rank on the gasification process. Four multi-day trials were carried out using a laboratory gasification facility designed for the large-scale experimental simulations of UCG and located in the Experimental Mine “Barbara”, located at Mikołów, Poland. Two Polish bituminous coals were investigated: coal sourced from “Piast-Ziemowit” mine and coal sourced from “Wesoła” mine. Each of the two coals was gasified in two separate experiments using oxygen-enriched air (OEA) and pure oxygen as the respective gasifying agents. Gasification with oxygen resulted in significantly higher gas quality and higher process efficiency than gasification with OEA. Higher concentrations of hydrogen (23.2% and 25.5%) and carbon monoxide (31.8% and 33.4%) were obtained when oxygen was used as a gasifying reagent, while lower concentrations were obtained in the case of gasification with OEA (7.1% and 9.5% of hydrogen; 6.4% and 19.7% of carbon monoxide). Average gas calorific values were 7.96 MJ/Nm3 and 9.14 MJ/Nm3 for the oxygen experiments, compared to 2.25 MJ/Nm3 and 3.44 MJ/Nm3 for the OEA experiments (“Piast-Ziemowit” coal and “Wesoła” coal, respectively). The higher coalification degree of “Wesoła” coal (82.01% of carbon) compared to the “Piast-Ziemowit” coal (68.62% of carbon) definitely improves the gas quality and energy efficiency of the process. The rate of water condensate production was higher for the oxygen gasification process (5.01 kg/h and 3.63 kg/h) compared to the OEA gasification process (4.18 kg/h and 2.63 kg/h, respectively), regardless of the type of gasified coal. Additionally, the textural characteristics (porosity development) of the chars remaining after coal gasification experiments were analyzed. A noticeable development of pores larger than 0.7 nm was only observed for the less coalified “Piast-Ziemowit” coal when analyzed under the more reactive atmosphere of oxygen.
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Kačur, Ján, Marek Laciak, Milan Durdán, and Patrik Flegner. "Investigation of Underground Coal Gasification in Laboratory Conditions: A Review of Recent Research." Energies 16, no. 17 (August 28, 2023): 6250. http://dx.doi.org/10.3390/en16176250.

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The underground coal gasification (UCG) technology converts coal into product gas and provides the option of environmentally and economically attractive coal mining. Obtained syngas can be used for heating, electricity, or chemical production. Numerous laboratory coal gasification trials have been performed in the academic and industrial fields. Lab-scale tests can provide insight into the processes involved with UCG. Many tests with UCG have been performed on ex situ reactors, where different UCG techniques, the effect of gasification agents, their flow rates, pressures, and various control mechanisms to improve gasification efficiency and syngas production have been investigated. This paper provides an overview of recent research on UCG performed on a lab scale. The study focuses on UCG control variables and their optimization, the effect of gasification agents and operating pressure, and it discusses results from the gasification of various lignites and hard coals, the possibilities of steam gasification, hydrogen, and methane-oriented coal gasification, approaches in temperature modeling, changes in coal properties during gasification, and environmental risks of UCG. The review focuses on laboratory tests of UCG on ex situ reactors, results, and the possibility of knowledge transfer to in situ operation.
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Bielowicz, Barbara, and Jacek Misiak. "The Impact of Coal’s Petrographic Composition on Its Suitability for the Gasification Process: The Example of Polish Deposits." Resources 9, no. 9 (September 9, 2020): 111. http://dx.doi.org/10.3390/resources9090111.

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In this paper, we discuss the impact of the rank of coal, petrographic composition, and physico-chemical coal properties on the release and composition of syngas during coal gasification in a CO2 atmosphere. This study used humic coals (parabituminous to anthracite) and lithotypes (bright coal and dull coal). Gasification was performed at temperatures between 600 and 1100 °C. It was found that the gas release depends on the temperature and rank of coal, and the reactivity increases with the increasing rank of coal. It was shown that the coal lithotype does not affect the gas composition or the process. Until 900 °C, the most intense processes were observed for higher rank coals. Above 1000 °C, the most reactive coals had a vitrinite reflectance of 0.5–0.6%. It was confirmed that the gasification of low-rank coal should be performed at temperatures above 1000 °C, and the reactivity of coal depends on the petrographic composition and physico-chemical features. It was shown that inertinite has a negative impact on the H2 content; at 950 °C, the increase in H2 depends on the rank of coal and vitrinite content. The physicochemical properties of coal rely on the content of maceral groups and the rank of coal. An improved understanding these relationships will allow the optimal selection of coal for gasification.
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Zhao, Li Hong, Xi Jie Chu, and Shao Juan Cheng. "Kinetic Study of CO2 Gasification of Coal Chars." Advanced Materials Research 550-553 (July 2012): 2754–57. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2754.

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The CO2 gasification of three coal chars were investigated for determining the gasification reactivity and the kinetic parameters. Experiments were conducted in a fluidized-bed reactor at temperature of 1173 k, 1273 k and 1373 k at atmospheric pressure. Gasification kinetic parameters of the samples were determined using Homogeneous model and shrinking-core model. It is found that the gasification reaction under chemical-reaction-rate control, the gasification reactivity of coal char are strongly dependent on the rank of coals and gasification temperature. Both models could describe CO2 gasification equally well, these kinetic values are comparable with the reported in the literature for the other chars under chemical control conditions.
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Hotchkiss, R. "Coal gasification technologies." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 1 (February 1, 2003): 27–33. http://dx.doi.org/10.1243/095765003321148664.

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This paper reviews coal gasification processes and technology. Sources of more detailed information in specific areas are suggested. The merits and disadvantages of incorporating coal gasification into power generation plants are discussed. The recent history of coal gasification technology and the current state of projects are summarized. The potential for large-scale coal gasification, small-scale coal gasification and cogasification of coal with biomass and/or wastes in the current economic climate is discussed.
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Dissertations / Theses on the topic "Coal gasification"

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Батальцев, Євген Володимирович, Евгений Владимирович Батальцев, and Yevhen Volodymyrovych Bataltsev. "Environmental aspects of coal gasification." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/33522.

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Consumption of solid fuels increases with the development of industry. Working with them is more difficult in terms of hardware and technical supply than with gaseous or liquid hydrocarbons. In addition, coal mining, its transportation, drying, grinding and burning in boilers, accompanied by the formation of solid waste (ash and slag) and significant air emissions of oxides of carbon, nitrogen and sulfur are taken into account. This requires the creation of new technology of solid fuels using to reduce the anthropogenic impact on the environment. This technology is called coal gasification. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/33522
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Perkins, Gregory Martin Parry Materials Science &amp Engineering Faculty of Science UNSW. "Mathematical modelling of underground coal gasification." Awarded by:University of New South Wales. Materials Science and Engineering, 2005. http://handle.unsw.edu.au/1959.4/25518.

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Mathematical models were developed to understand cavity growth mechanisms, heat and mass transfer in combination with chemical reaction, and the factors which affect gas production from an underground coal gasifier. A model for coal gasification in a one-dimensional spatial domain was developed and validated through comparison with experimental measurements of the pyrolysis of large coal particles and cylindrical coal blocks. The effects of changes in operating conditions and coal properties on cavity growth were quantified. It was found that the operating conditions which have the greatest impact on cavity growth are: temperature, water influx, pressure and gas composition, while the coal properties which have the greatest impact are: the thermo-mechanical behaviour of the coal, the coal composition and the thickness of the ash layer. Comparison of the model results with estimates from field scale trials, indicate that the model predicts growth rates with magnitudes comparable to those observed. Model results with respect to the effect of ash content, water influx and pressure are in agreement with trends observed in field trials. A computational fluid dynamics model for simulating the combined transport phenomena and chemical reaction in an underground coal gasification cavity has been developed. Simulations of a two-dimensional axi-symmetric cavity partially filled with an inert ash bed have shown that when the oxidant is injected from the bottom of the cavity, the fluid flow in the void space is dominated by a single buoyancy force due to temperature gradients established by the combustion of volatiles produced from the gasification of carbon at the cavity walls. Simulations in which the oxidant was injected from the top of the cavity reveal a weak fluid circulation due to the absence of strong buoyancy forces, leading to poor gasification performance. A channel model of gas production from underground coal gasification was developed, which incorporates a zero-dimensional cavity growth model and mass transfer due to natural convection. A model sensitivity study is presented and model simulations elucidate the effects of operating conditions and coal properties on gas production.
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Norman, Narcrisha S. "Catalytic coal gasification using calcium oxide /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1203573171&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Thesis (M.S.)--Southern Illinois University Carbondale, 2006.
"Department of Mechanical Engineering and Energy Processes." Includes bibliographical references (leaves 62-66). Also available online.
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Quartermaine, R. E. "Microstructural aspects of catalytic coal gasification." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377237.

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Saha, Gautam. "The role of coal surface charge in catalyzed coal gasification." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 1992. http://digitalcommons.auctr.edu/dissertations/2173.

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The influence of the electrokinetic properties of coal on the adsorption and gasification activities of calcium acetate and potassium carbonate has been studied. It has been found from zeta potential measurements on lignite, subbituminous and bituminous coals that the coal particles are negatively charged in both acidic and basic solutions, although the negative charge density is more pronounced in strongly alkaline media. In general, the extent of calcium or potassium adsorption correlated with the negative zeta potentials. Calcium or potassium adsorption followed the order lignite > subbituminous > bituminous coal. Increased char reactivities were observed with catalysts loaded from basic or neutral solutions compared to catalysts impregnated from acidic solutions. The enhanced activities are attributed to increased contact between the anionic coal surface and the metal ions during catalyst loading. It is suggested that the extent of coal-catalyst interaction during catalyst loading from solution plays an important role in coal char reactivity.
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Amure, Olushola Adenike. "Ammonia formation in air blown coal gasification." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395495.

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Neseyif, S. "Predicting corrosion rates within coal gasification environments." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309623.

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Halsall, I. L. "Coal gasification kinetics simulated in laminar flames." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233080.

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Duff, Alastair James. "The mechanism of the direct hydrogasification of coals and polymeric coal models." Thesis, Heriot-Watt University, 1988. http://hdl.handle.net/10399/965.

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Visagie, J. P. "Generic gasifier modelling evaluating model by gasifier type /." Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-07022009-133535.

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Books on the topic "Coal gasification"

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Higman, Chris. Gasification. 2nd ed. Amsterdam: Gulf Professional Pub./Elsevier Science, 2008.

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Higman, Chris. Gasification. Boston: Gulf Professional Pub., 2003.

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Higman, Chris. Gasification. Boston, MA: Gulf Professional Pub., 2002.

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Figueiredo, José L., and Jacob A. Moulijn, eds. Carbon and Coal Gasification. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4382-7.

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De, Santanu, Avinash Kumar Agarwal, V. S. Moholkar, and Bhaskar Thallada, eds. Coal and Biomass Gasification. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7335-9.

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Smoot, L. Douglas, and Philip J. Smith. Coal Combustion and Gasification. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4757-9721-3.

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1951-, Smith Philip J., ed. Coal combustion and gasification. New York: Plenum Press, 1985.

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1955-, Pourkashanian M., and Jones J. M. 1964-, eds. Combustion and gasification of coal. New York: Taylor & Francis, 2000.

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Bell, D. A. Coal gasification and its applications. Oxford, U.K: William Andrew/Elsevier, 2011.

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der, Burgt Maarten van, ed. Gasification. Amsterdam: Gulf Professional, 2003.

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Book chapters on the topic "Coal gasification"

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Li, Qiang, and Jiansheng Zhang. "COAL GASIFICATION." In Multiphase Reactor Engineering for Clean and Low-Carbon Energy Applications, 65–118. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119251101.ch3.

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Liu, Ke, Zhe Cui, and Thomas H. Fletcher. "Coal Gasification." In Hydrogen and Syngas Production and Purification Technologies, 156–218. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470561256.ch4.

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Xie, Ke-Chang. "Coal Gasification." In Structure and Reactivity of Coal, 181–241. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47337-5_5.

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Moulijn, J. A., and F. Kapteijn. "Catalytic Gasification." In Carbon and Coal Gasification, 181–95. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4382-7_6.

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Gluyas, J. G. "Underground Coal Gasification." In Selective Neck Dissection for Oral Cancer, 1–4. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-02330-4_119-1.

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Moulijn, J. A., and P. J. J. Tromp. "Coal Pyrolysis." In Carbon and Coal Gasification, 455–84. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4382-7_17.

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Thomas, K. Mark. "Coal Structure." In Carbon and Coal Gasification, 57–92. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4382-7_3.

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Zhuang, Qianlin. "Modern Gasification Process." In From Coal to Hydrogen, 193–223. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-55586-2_13.

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Hüttinger, K. J. "Kinetics of Coal Gasification." In New Trends in Coal Science, 433–52. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3045-2_20.

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Shrivastava, Devansh. "Underground coal gasification modelling." In Modeling and Simulation of Fluid Flow and Heat Transfer, 19–33. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781032712079-2.

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Conference papers on the topic "Coal gasification"

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Zhao, Yufeng, Zhen Dong, Yanpeng Chen, Hao Chen, Junjie Xue, Shanshan Chen, Mengyuan Zhang, and Yan Peng. "Stress-Dependent Characteristics of Coal Permeability in Gasification Zone of Underground Coal Gasification." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0389.

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ABSTRACT Underground coal gasification (UCG) is an environment friendly way to produce coal resource and its efficiency depends on gas flow through porous medium. Therefore, the flow behavior especially the stress-dependent permeability characteristics are important topics for the UCG. The stress-dependent permeability characteristics in combustion zone are widely investigated, while, ones in gasification zone are rarely investigated but they are important for gas flow from injection wells to production wells. In this study, first, permeability tests for coal after heating below 500°C were conducted under various confining pressure. Secondly, microscopic structures of coal samples after heating were observed by the scanning electron microscope (SEM). Finally, the stress-dependent permeability characteristics of coal after heating were discussed and a model involving thermal-mechanical effect was built. The main results show that (1) permeability decreases and then increases with temperature. The increase magnitude of permeability becomes obvious at 200°C and it rises significantly up to 430% at 500°C. (2) the stress-dependent behavior of permeability decreases with temperature. The decrease magnitude can be 60%. (3) samples’ microscopic structures are affected by coal pyrolysis after heating and further affect permeability characteristics. Before 200°C, obvious change of microscopic structure is width increase of existing microscopic fractures. After 200°C, lots of new microscopic fractures are generated and macroscopic fractures may also be generated in some samples. (4) considering impacts of stress, thermal swelling and microscopic fracture generated by coal pyrolysis on permeability, a model is generated and its mean error is less than 4.3%. INTRODUCTION Underground coal gasification (UCG) technology, as a cutting-edge technology for clean coal, has developed rapidly in recent years and has also been the focus of academic and industrial circles[1]. This technology can mine deep and ultra-deep coal seams that cannot be mined by ordinary mining technology. The coal reserves of these coal reservoirs are often much higher than those of the middle and shallow coal seams. In addition, since the redox reaction occurs in the formation, the raw coal is converted into clean energy based on CO, CH4, and H2 in the original position[2]. This process leaves the ash produced by gasification in the ground and avoids environmental pollution. It also saves the cost of transporting coal to the ground under normal mining conditions [3].
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Ajilkumar, A., T. Sundararajan, and U. S. P. Shet. "Gasification of Indian Coal in a Tubular Coal Gasifier." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32648.

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In spite of the high ash content, Indian coals have been widely used for the generation of power and industrial steam in India. Being considered as the technology for future in terms of efficiency and cleaner environment, coal gasification carries much importance since India has a large amount of coal reserves. In this paper, the numerical simulations have been performed on gasification performance of three types of Indian coals in atmospheric as well as pressurized conditions in an entrained flow, air-blown tubular gasifier. In the model, continuous phase conservation equations are solved in an Eularian frame and those of particle phase are solved in a Lagrangian frame, with coupling between the two phases incorporated through interactive source terms. Phenomena such as devolatilisation, combustion of volatiles, char combustion & gasification and the dispersion of coal particles due to turbulence are taken into account. The P-1 model has been adopted for radiative heat transfer in which scattering is taken into account for the particles. It is observed that as the ash percentage increases, the heat and mass transfer are strongly affected and the gasification performance decreases. This is attributed to the lower char reactivity due to thick ash layers and lower oxygen and other gas diffusion rates. Various regions such as devolatilisation, combustion and gasification zones inside the gasifier have been identified using the temperature plots, devolatilisation plots and mass depletion histories of coal particles. The overall gasification performance indices such as carbon conversion, heating value of the exit gas and cold gas efficiency have been predicted.
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Tumenbayar, A., Ch Dashpuntsag, and E. Enkhsaikhan. "Mathematical model of coal gasification." In 2013 8th International Forum on Strategic Technology (IFOST). IEEE, 2013. http://dx.doi.org/10.1109/ifost.2013.6616929.

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Watts, Donald H., Edward O. Gerstbrein, and Douglas M. Todd. "Gas Turbine Operations of Synfuel Derived From Coal Gasification." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-223.

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A modified version of a commercially available General Electric MS7001E gas turbine has been successfully operated on synfuel derived from coal at the Cool Water Coal Gasification Program. This paper addresses Cool Water’s experience with the MS7001E gas turbine in base load applications; starting and operating reliability; maintenance experience; modifications to the gas turbine including fuel delivery, combustion and control systems; and, future applications of advanced gas turbines in Integrated Coal Gasification Combined Cycle (IGCC) service.
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Mastalerz, Maria D., Agnieszka Drobniak, and John A. Rupp. "POTENTIAL OF ILLINOIS BASIN COALS FOR UNDERGROUND COAL GASIFICATION." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-316331.

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Iki, Norihiko, Osamu Kurata, and Atsushi Tsutsumi. "Performance of IGFC With Exergy Recuperation." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26675.

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The Integrated coal Gasification Combined Cycle (IGCC) is considered to be a very clean and efficient system for coal-fired power generation. And given the development of 100 MW-scale solid oxide fuels cells (SOFCs), the integrated coal Gasification Fuel Cell combined cycle (IGFC) would be the most efficient coal-fired power generation system. However, more energy efficient power generation systems must be developed in order to reduce CO2 emissions over the middle and long term. Thus, the authors have proposed the Advanced Integrated coal Gasification Combined Cycle (A-IGCC) and Advanced IGFC (A-IGFC) systems, which utilize exhaust heat from solid oxide fuel cells (SOFCs) and/or gas turbines as a heat source for gasification (exergy recuperation). The A-IGCC and A-IGFC systems utilize a twin circulating fluidized bed coal gasifier consisting of three primary components: a pyrolyzer, steam reformer and partial combustor. The temperature of the steam reformer is 800 °C, and that of the partial oxidizer is 950 °C. Since the syngas, produced by pyrolysis and the reforming process involving volatile hydrocarbons, tar and char, contains carbon monoxide and hydrogen, the A-IGCC technology has considerable potential for higher thermal efficiency while utilizing low-grade coals. The coal types utilized in the study were bituminous Taiheiyo, sub-bituminous Adaro and Loy Yang coal. Milewski’s formula was used to model the circuit voltage of the SOFC. Cool gas efficiency increases, in order, from Taiheiyo coal to Adaro coal to Loy Yang coal. The A-IGFC system has the potential to achieve high thermal efficiency using various coals, with Loy Yang coal achieving the highest thermal efficiency. However, the drying process for Loy Yang and Adaro coal is an important issue.
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Sajjad, Mojibul, and Mohammad Rasul. "Underground Coal Gasification in abandoned Coal Seam Gas blocks." In 1st International e-Conference on Energies. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ece-1-b002.

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Bhattacharya, Chittatosh, and Nilotpal Banerjee. "Integrated Drying and Partial Coal Gasification for Low NOX Pulverized Coal Fired Boiler." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55108.

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Coal bound moisture is a key issue in pulverized coal fired power generation. Coal being hygroscopic, accumulates considerable surface moisture with seasonal variations. A few varieties of coals are having unusually high inherent as well as surface moisture that affects the pulverizer performance and results lower thermal efficiency of the plant. A proper coal drying is essential for effective pulverization and pneumatic conveyance of coal to furnace. But, the drying capacity is limited by available hot airflow and temperature of hot primary air. Even, use of high-grade coal for blending would not provide the entire useful heat value due to moisture, when used for matching power plant design coal parameters. Besides, the inefficient mining, transportation, stacking and associated coal fleet management deteriorates the “as fired” coal quality affecting cost while purchased on “total moisture and gross heat value” basis. Partial devolatilisation of coal in a controlled heating process, prior combustion in fuel-rich environment ensures better in-furnace flame stability and less residual carbon in product of combustion. It improves the opportunity of a lower flame zone temperature, delivering better control over thermal NOx formation from fuel bound nitrogen. The pulverized coal fired power plants use coal feeders in either gravimetric or volumetric mode of feeding that needs correction for moisture in coal which changes the coal throughput requirement. In this paper an integrated coal drying and partial coal gasification system model is discussed to improve the useful heat value for pulverized coal combustion of high moisture typical power coals so that related improvement in coal throughput can be carried out by application of suitable coal drying mechanism like Partial Flue Gas Recirculation through Pulverizer (PFGR©) for mitigating the coal throughput demand with optimizing available pulverizing capacity along NOx control opportunity without derating steam generation capacity of the boiler.
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Kacur, Jan. "UNDERGROUND COAL GASIFICATION IN LABORATORY CONDITIONS." In SGEM2011 11th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2011/s18.118.

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Hong Son, Nguyen Le, Nguyen Hoang Anh, and Hoang Ngoc Dong. "Review of Underground Coal Gasification Technologies." In 2016 3rd International Conference on Green Technology and Sustainable Development (GTSD). IEEE, 2016. http://dx.doi.org/10.1109/gtsd.2016.26.

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Reports on the topic "Coal gasification"

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Jamieson, Matthew. Coal gasification operations. Office of Scientific and Technical Information (OSTI), January 2023. http://dx.doi.org/10.2172/1922941.

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Sundaram, M., P. Fallon, and M. Steinberg. Mild gasification of coal. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/7183385.

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Reid, Douglas J., James E. Cabe, and Mark D. Bearden. PNNL Coal Gasification Research. Office of Scientific and Technical Information (OSTI), July 2010. http://dx.doi.org/10.2172/985585.

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Steve Colt. Beluga Coal Gasification - ISER. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/963355.

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D. Steve Dennis. Underground Coal Gasification Test Project. Office of Scientific and Technical Information (OSTI), December 2005. http://dx.doi.org/10.2172/914533.

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Yang, X., J. Wagoner, and A. Ramirez. Monitoring of Underground Coal Gasification. Office of Scientific and Technical Information (OSTI), August 2012. http://dx.doi.org/10.2172/1345326.

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Author, Not Given. ENCOAL Mild Coal Gasification project. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/7054718.

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Frederick, J. ENCOAL Mild Coal Gasification project. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/6680255.

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Author, Not Given. Coal gasification experiments: Final report. Office of Scientific and Technical Information (OSTI), March 1988. http://dx.doi.org/10.2172/6200057.

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Thimsen, D., R. E. Maurer, A. R. Pooler, D. Pui, B. Liu, and D. Kittelson. Fixed-bed gasification research using US coals. Volume 2. Gasification of Jetson bituminous coal. Office of Scientific and Technical Information (OSTI), March 1985. http://dx.doi.org/10.2172/5916895.

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