Relevant bibliographies by topics / Coal gasification process

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Academic literature on the topic 'Coal gasification process'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Coal gasification process"

1

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 (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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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 (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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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 (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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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 (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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Kim, Hakduck, Kitae Jeon, Heechang Lim, and Juhun Song. "Parameter analysis of an entrained flow gasification process." Advances in Mechanical Engineering 10, no. 12 (2018): 168781401881525. http://dx.doi.org/10.1177/1687814018815255.

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This work presents primary results of a parameter study for entrained flow gasification using a steady-flow reactor model. The influences of important parameters such as coal types, gasifier pressure, gas/coal feeding rate, and coal particle size were studied based on coal conversion and gas product species. The prediction results were compared and validated against those published previously. In particular, a relative importance of reaction stoichiometry, temperature, reaction time (kinetics), or residence time considered in this simulation work was evaluated to affect the gas composition produced from different coals. The optimal carbon monoxide concentration was observed at an oxygen-to-fuel ratio of 0.8, while a greatest carbon conversion was found at a steam-to-fuel ratio of 0.4. Coal particle size has a strong influence on carbon conversion. However, the coal feeding rate has no effect on carbon conversion despite differences in residence time.
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Yu, Hai Long, Feng Kun Wang, Gui Fang Zhang, and Jian Zhong Liu. "Numerical Simulation of Coal Oil Water Slurry Gasification Process in New-Type Coal Water Slurry Gasifier." Applied Mechanics and Materials 229-231 (November 2012): 2501–5. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2501.

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The gasification process of coal oil water (COW) slurry in new-type coal water slurry(CWS) gasification furnace was studied with numerical simulation method. The temperature and concentration fields were obtained for the gasification furnace. The simulated results showed that the gasification effect of the new-type coal water slurry gasification is better than the common coal water slurry gasification. In the new-type gasification furnace, the average temperature is slightly increased and the carbon translative ratio is increased by 1.81%. The effective component (CO+H2) in coal gas at the outlet of the furnace is increased by 10.58%, and the concentration of CO2and H2O is greatly decreased. The H2O dissolution ratio is greatly increased and the gasification effect is obviously better that that of the common coal water slurry.
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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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Petrovic, David, Dusko Djukanovic, Dragana Petrovic, and Igor Svrkota. "Contribution to creating a mathematical model of underground coal gasification process." Thermal Science 23, no. 5 Part B (2019): 3275–82. http://dx.doi.org/10.2298/tsci180316155p.

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Underground coal gasification, as an auto thermal process, includes processes of degasification, pyrolysis, and the gasification itself. These processes occur as a result of a high temperature and the management of coal combustion during addition of gasification agent. Air, water vapor mixed with air, air or water vapor enriched with oxygen, or pure oxygen, may be used as gasification agents. Resulting gas that is extracted in this process may vary in chemical composition, so it is necessary to adjust it. That is the reason why it is necessary to develop a mathematical model of the underground gasification process prior to any operations in coal deposit, in order to obtain as much accurate prediction of the process as possible. Numerical calculation provides prediction of gas mixture?s chemical composition, which enables calculation of gas components? energy contents and total energy content of the gas in predicted underground coal gasification process. It is one of the main criteria in the economic assessment of underground coal gasification process. This paper, based on available data on researches in this area, provides a contribution to creation of mathematical model of underground coal gasification.
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Dubiński, Józef, and Marian Turek. "Basic Aspects Of Productivity Of Underground Coal Gasification Process." Archives of Mining Sciences 60, no. 2 (2015): 443–53. http://dx.doi.org/10.1515/amsc-2015-0029.

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Abstract An analysis of conditions which enable attaining possibly highest productivity of industrial scale underground coal gasification technology is presented. The analysis was prepared basing on results obtained during an experimental gasification process conducted in workings of an active hard coal mine. Basic aspects determining application and productivity of the technology concern both general conditions, referring to the hard coal seam being gasified, and practical issues, which need to be considered in coal mine conditions. To present them, the technology of underground coal gasification and still commonly used classical longwall method of mining coal seams are compared.
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Wachowicz, Jan, Jacek Marian Łączny, Sebastian Iwaszenko, Tomasz Janoszek, and Magdalena Cempa-Balewicz. "Modelling of Underground Coal Gasification Process Using CFD Methods / Modelowanie Procesu Podziemnego Zgazowania Węgla Kamiennego Z Zastosowaniem Metod CFD." Archives of Mining Sciences 60, no. 3 (2015): 663–76. http://dx.doi.org/10.1515/amsc-2015-0043.

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Abstract The results of model studies involving numerical simulation of underground coal gasification process are presented. For the purpose of the study, the software of computational fluid dynamics (CFD) was selected for simulation of underground coal gasification. Based on the review of the literature, it was decided that ANSYS-Fluent will be used as software for the performance of model studies. The ANSYS- -Fluent software was used for numerical calculations in order to identify the distribution of changes in the concentration of syngas components as a function of duration of coal gasification process. The nature of the calculations was predictive. A geometric model has been developed based on construction data of the georeactor used during the researches in Experimental Mine “Barbara” and Coal Mine “Wieczorek” and it was prepared by generating a numerical grid. Data concerning the georeactor power supply method and the parameters maintained during the process used to define the numerical model. Some part of data was supplemented based on the literature sources. The main assumption was to base the simulation of the georeactor operation on a mathematical models describing reactive fluid flow. Components of the process gas and the gasification agent move along the gasification channel and simulate physicochemical phenomena associated with the transfer of mass and energy as well as chemical reactions (together with the energy effect). Chemical reactions of the gasification process are based on a kinetic equation which determines the course of a particular type of equation of chemical coal gasification. The interaction of gas with the surrounding coal layer has also been described as a part of the model. The description concerned the transport of thermal energy. The coal seam and the mass rock are treated as a homogeneous body. Modelling studies assumed the coal gasification process is carried out with the participation of separately oxygen and air as a gasification agent, under the specific conditions of the georeactor operations within the time interval of 100 hours and 305 hours. The results of the numerical solution have been compared with the results of experimental results under in-situ conditions.
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Dissertations / Theses on the topic "Coal gasification process"

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Silaen, Armin. "Simulation of Coal Gasification Process Inside a Two-Stage Gasifier." ScholarWorks@UNO, 2004. http://scholarworks.uno.edu/td/198.

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Gasification is a very efficient method of producing clean synthetic gas (syngas) which can be used as fuel for electric generation or chemical building block for petrochemical industries. This study performs detailed simulations of coal gasification process inside a generic two-stage entrained-flow gasifier to produce syngas carbon monoxide and hydrogen. The simulations are conducted using the commercial Computational Fluid Dynamics (CFD) solver FLUENT. The 3-D Navier-Stokes equations and seven species transport equations are solved with eddy-breakup combustion model. Simulations are conducted to investigate the effects of coal mixture (slurry or dry), oxidant (oxygen-blown or air-blown), wall cooling, coal distribution between the two stages, and the feedstock injection angles on the performance of the gasifier in producing CO and H2. The result indicates that coal-slurry feed is preferred over coal-powder feed to produce hydrogen. On the other hand, coal-powder feed is preferred over coal-slurry feed to produce carbon monoxide. The air-blown operation yields poor fuel conversion efficiency and lowest syngas heating value. The two-stage design gives the flexibility to adjust parameters to achieve desired performance. The horizontal injection design gives better performance compared to upward and downward injection designs.
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Medcalf, Bradley D. "The chemchar gasification process : theory, experiment, and design developments /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901263.

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McLaughlin, John. "The removal of volatile alkali salt vapours from hot coal-derived gases." Thesis, University of Surrey, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255851.

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Lee, Ching Yuan. "Problems involved in simulating the flash carbonization process." Ohio : Ohio University, 1987. http://www.ohiolink.edu/etd/view.cgi?ohiou1183048088.

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Robinson, Jeffrey Scott. "Polishing H₂S from coal gasification streams using a high temperature electrochemical membrane separation process." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/32801.

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McHenry, Dennis John Jr. "Development of an electrochemical membrane process for removal of SOx/NOx from flue gas." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/11698.

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Ponzio, Anna. "Thermally homogenous gasification of biomass/coal/waste for medium or high calorific value syngas production." Doctoral thesis, KTH, Energi- och ugnsteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4902.

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Today’s problems with emissions of green house gases, land filling of waste and depletion of the oil reserves calls for new energy systems based on alternative fuels like biomass and waste. Gasification is an attractive technology for the use of such solid fuels. Conventional gasification, in the vast majority of cases, uses in-reactor heat release from combustion of part of the feedstock, possibly coupled with a limited preheating of the agent, to obtain the necessary temperatures in the gasifier bed. During recent years, a new gasification technology, using highly preheated gasification agents (&gt; 1273 K), has been developed. The extra heat brought into the process by the high temperature agent reduces the amount of feedstock that has to be oxidized to supply the necessary heat and the use of highly preheated agents has previously proven to have several positive effects on the fuel gas quality.In difference to the previous work on gasification with highly preheated agents, this thesis primarily focuses on the fundamental aspects namely, mass conversion, heating and ignition. It starts by considering single fuel particles or thin beds of fuel particles inserted into highly preheated agents. Mass conversion, heating and ignition are reported in function of the temperature and oxygen concentration of the agent and formulas for the prediction of ignition time and ignition mechanism are developed. The perspective is then widened to include the whole gasifier bed. Simulations of fixed bed batch gasification using highly preheated agents are performed with a mathematical model and used to study how the high agent temperature influences the mass conversion, devolatilisation front rate and the temperature distribution in the fixed fuel bed. Further, the gas quality and gasification efficiency are studied by means of large scale experiment. Ultimately, a thermodynamic analysis of the whole autothermal gasification system, including both a regenerative preheating system and the gasifier, is made.The particle study reports results from experiments with wood and coal and agents consisting of mixtures of nitrogen and oxygen in various proportions. It is shown that an increase in agent temperature from 873 K to 1273 K make the conversion process faster, mostly due to an early onset of the devolatilisation (fast drying) but also due to an increased devolatilisation rate (at least in the case of wood). The time to ignition also decreases significantly, particularly so between 873 and 1073 K. Further, it is shown that the higher the agent temperature, the more pronounced was also the tendency of the coal particles to heat significantly faster in oxygen diluted conditions (5,10 and 21% oxygen) than in inert (0% oxygen) or oxygen rich conditions (30, 50, 80 and 100% oxygen). An increase in agent temperature is also shown to reduce the dependency of the process on the oxygen concentration, at least in diluted conditions (5-21% oxygen). The results also indicate that for coal an increase in the oxygen concentration, specifically in the region above the atmospheric concentration, leads to a decreased dependency on the agent temperature. It is finally shown in the experiments with agent temperatures of 1073 and 1273 K that a flame is promptly formed even in very low concentrations of oxygen.The gasifier study reports results from simulation of batch air gasification and experiments in both batch and continuous up-draft fixed bed gasifier with wood and waste derived fuel and air and mixtures of air and steam. It is shown that the conversion process is faster the higher the air temperature. In particular somewhere between air temperatures of 623 K and 803 K the process behaviour changes. In fact, the devolatilisation rate is significantly increased in this region while it increases less sharply with air temperature below and above this temperature window. The temperature distribution in the bed shows less sharp gradients at high temperature (&gt; 803 K) than at low temperatures (&lt; 623 K). It is also showed experimentally and in fairly large scale that the use of highly preheated air for the gasification of biomass and waste derived fuels can produce - in continuous mode – relatively high yields of product syngas with relatively high fractions of combustible gases and probably also low content of tar. The efficiency of the gasification under these conditions, even when the extra heat input in the preheated agent is considered in the computation of the gasification efficiency, is shown to be comparable to that of conventional gasification techniques. The results also shows that with the use of steam in the agent, the content of hydrogen can be further increased with respect to gasification with only preheated air.In base of the results of the particle study and the gasifier study it is shown that a there exists two regimes of operation in function of the agent temperature, separated by the minimum agent temperature to guarantee spontaneous ignition regardless of the particle temperature. The value of this temperature depend on material properties and the kinetics of the reaction, thus also on the oxygen concentration. When agent temperatures below the minimum agent temperature to guarantee spontaneous ignition regardless of the particle temperature are used, the drying and devolatilisation are mainly controlled by the heat released by reactions. The heating of the fuel particles and their devolatilisation are relatively slow and the devolatilisation rate is highly oxygen dependent. In a fixed bed, the devolatilisation front rate is low and the bed is characterised by significant temperature gradients.When the agent temperature is higher than the minimum agent temperature to guarantee spontaneous ignition regardless of the particle temperature, the drying and devolatilisation are mainly controlled by the convective heat transfer from the preheated agent and the released volatiles ignite very fast even in diluted conditions. This results in very efficient heat transfer to the fuel particles. In the fixed fuel bed the process is characterized by a high devolatilisation front rate. Thus, the temperature gradients in the bed are significantly reduced and the gasification can be said to be thermally homogeneous. Thanks to high rates of heat transfer and mass conversion, the heating value of the dry produced syngas is high with high concentrations of combustible species. The ignition of the volatiles and the high temperatures all along the bed presumably contributes to the reduction of the tar content even in up-draft configurations. The high temperatures also allows for operation with reduced air – to – fuel ratios which further increased the value of the produced gas (thanks to less dilution by nitrogen).The system study presents a concept for an autothermal system including both preheating and gasification. Results from a thermodynamic analysis of such a system are reported. Autothermal operation of a thermally homogeneous gasifier is possible only in a twin component system in which the gasifier is coupled to a preheating system able to reach preheating temperatures well above the minimum agent temperature to guarantee spontaneous ignition regardless of the particle temperature. It is shown that to reach certain temperature levels of the gasification air, heat exchange between product gas and air is not enough and the preheating system has to improve the temperatures involved, for example by burning part of the produced gas in a regenerative preheater. Further, it is shown that in comparison to gasifier without such a system for additional preheating, the autothermal Thermally Homogeneous Gasification system has the ability to significantly improve the gas quality (in terms of heating value of the dry gas) without losing energy- or exergy efficiency to an appreciable extent.<br>QC 20100903
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Skhonde, Madoda Pet. "Sulphur behaviour and capturing during a fixed-bed gasification process of coal / by Madoda Pet Skhonde." Thesis, North-West University, 2009. http://hdl.handle.net/10394/2333.

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Young, Christopher Michael. "Pressure Effects on Black Liquor Gasification." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11539.

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Gasification of black liquor is an alternative to the combustion of black liquor, which is currently the dominant form of chemical recovery in the paper industry. Gasification of black liquor offers the possibility of higher thermal efficiencies than combustion, reducing manufacturing costs and creating new revenue streams through a forest biorefinery. Pressurizing the gasification reactor further enhances the efficiency advantage of gasification over combustion. This study uses a pressurized entrained flow reactor (PEFR) to study black liquor gasification behavior under pressures, temperatures, and heating rates similar to those of next-generation high-temperature black liquor gasifiers. The effects of pressure on black liquor char morphology, gasification rates, pyrolysis carbon yields, and sulfur phase distribution were studied. These characteristics were investigated in three main groups of experiments at 900oC: pyrolysis (100% N2), gasification with constant partial pressure (0.25 bar H2O and 0.50 bar CO2), and gasification with constant mole fraction (10% CO2, 2% H2O, 1.7% CO, 0.3% H2), under five, ten, and fifteen bar total pressure. It was found that pressure had an impact on the char physical characteristics immediately after the char entered the reactor. Increasing pressure had the effect of decreasing the porosity of the chars. Pressure also affected particle destruction and reagglomeration mechanisms. Surface areas of gasification chars decreased with increasing pressures, but only at low carbon conversions. The rate of carbon conversion in gasification was shown to be a function of the gas composition near the particle, with higher levels of inhibiting gases slowing carbon conversion. The same phenomenon of product gas inhibition observed in gasification was used to explain carbon conversions in pyrolysis reactions. Sulfur distribution between condensed and gas phases was unaffected by increasing total pressure in the residence times investigated. Significant amounts of sulfur are lost during initial devolatilization. With water present this gas phase sulfur forms H2S and did not return to the condensed phase.
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Sridhar, Deepak. "Oxygen Carrier Development and Integrated Process Demonstration for Chemical Looping Gasification Systems." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338322340.

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Books on the topic "Coal gasification process"

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Eugene, Boysen John, University of North Dakota. Energy and Environmental Research Center., and Gas Research Institute, eds. Detailed evaluation of process and environmental data from the Rocky Mountain 1 underground coal gasification field test: Final report. Energy & Environmental Research Center, University of North Dakota, 1998.

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Air and Energy Engineering Research Laboratory, ed. Chemically active fluid bed process for sulfur removal during gasification of carbonaceous fuels: Project summary. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1988.

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United States. Dept. of Energy., Air Products Liquid Phase Conversion Company., and U.S. Clean Coal Technology Demonstration Program., eds. Commercial-scale demonstration of the liquid phase methanol (LPMEOH) process: A report on a project conducted jointly under a cooperative agreement between the U.S. Department of Energy and Air Products Liquid Phase Conversion Company. Clean Coal Technology, 1999.

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Commercial-scale demonstration of the liquid phase methanol (LPMEOH) process: A report on a project conducted jointly under a cooperative agreement between the U.S. Department of Energy and Air Products Liquid Phase Conversion Company. Clean Coal Technology, 1999.

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Book chapters on the topic "Coal gasification process"

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Arora, Pratham, Andrew Hoadley, and Sanjay Mahajani. "Sustainability Assessment of the Biomass Gasification Process for Production of Ammonia." In Coal and Biomass Gasification. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7335-9_14.

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Kumar, Sushant. "Modified Coal Gasification Process for Hydrogen Production." In Clean Hydrogen Production Methods. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-14087-2_4.

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van Diepen, A. E., and J. A. Moulijn. "Effect of Process Conditions on Thermodynamics of Gasification." In Desulfurization of Hot Coal Gas. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-58977-5_4.

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Jacobs, A., F. De Schutter, J. Vangrunderbeek, J. Luyten, R. Van Landschoot, and J. Schoonman. "Development of Gas Sensors for Coal Gasification Processes." In Energy Efficiency in Process Technology. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1454-7_29.

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Goyal, A., and A. Rehmat. "Fuel Evaluation for a Fluidized-Bed Gasification Process (U-GAS)." In Clean Energy from Waste and Coal. American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0515.ch005.

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Liu, Derong, Qinglai Wei, Ding Wang, Xiong Yang, and Hongliang Li. "Adaptive Dynamic Programming for Optimal Control of Coal Gasification Process." In Adaptive Dynamic Programming with Applications in Optimal Control. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50815-3_13.

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Rabou, Luc P. L. M., Bram Van der Drift, Eric H. A. J. Van Dijk, Christiaan M. Van der Meijden, and Berend J. Vreugdenhil. "MILENA INDIRECT GASIFICATION, OLGA TAR REMOVAL, AND ECN PROCESS FOR METHANATION." In Synthetic Natural Gas from Coal, Dry Biomass, and Power-to-Gas Applications. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119191339.ch9.

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Phillips, J. N., and H. W. A. Dries. "Filtration of Flyslag from the Shell Coal Gasification Process Using Porous Ceramic Candles." In Gas Cleaning at High Temperatures. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2172-9_9.

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Williams, A. R. "The Use of Reverse Osmosis for the Purification of Coal Gasification Liquors." In Effective Industrial Membrane Processes: Benefits and Opportunities. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3682-2_8.

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"Thermodynamic Process Assessment." In Industrial Coal Gasification Technologies Covering Baseline and High-Ash Coal. Wiley-VCH Verlag GmbH & Co. KGaA, 2014. http://dx.doi.org/10.1002/9783527336913.ch07.

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Conference papers on the topic "Coal gasification process"

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Wang, Kangcheng, Chao Shang, Fan Yang, Yongheng Jiang, and Dexian Huang. "Reaction temperature estimation in Shell coal gasification process." In 2019 IEEE 15th International Conference on Automation Science and Engineering (CASE). IEEE, 2019. http://dx.doi.org/10.1109/coase.2019.8842883.

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Iwaszenko, Sebastian, and Karolina Nurzynska. "GPR data visualization for underground coal gasification process research." In IGARSS 2014 - 2014 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2014. http://dx.doi.org/10.1109/igarss.2014.6946761.

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Mrakin, A. N., A. A. Selivanov, A. V. Satonin, T. V. Minervina, P. A. Batrakov, and D. V. Ermolaev. "Calculation study of the coal gasification process with steam." In INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS2020). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0027713.

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Bogdanovska, Gabriela. "HAZARD AND OPERABILITY STUDY IN THE UNDERGROUND COAL GASIFICATION PROCESS." In 16th International Multidisciplinary Scientific GeoConference SGEM2016. Stef92 Technology, 2016. http://dx.doi.org/10.5593/sgem2016/b21/s07.030.

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Messerle, V. E., A. B. Ustimenko, N. A. Slavinskaya, and U. Riedel. "Influence of Coal Rank on the Process of Plasma Aided Gasification." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68701.

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This paper describes numerical and experimental investigations of coal gasification in a combined arc-plasma entrained flow gasifier. The experimental installation is intended to operate in the electric power range of 30–100 kW, mass averaged temperature 1800–4000 K, coal dust consumption 3–10 kg·h−1 and gas-oxidant flow 0.5–15 kg·h−1. The numerical experiments were conducted using the PLASMA-COAL computer code. It was designed for computation of the processes in plasma gasifiers. This code is based on a one-dimensional model, which describes the two-phase chemically reacting flow with an internal plasma source. The thermo-chemical conversion of the oxidizer-coal mixture is described through formation of primary volatile products, their conversion in the gas phase and the coke residue gasification reactions. Kazakhstan Ekibastuz bituminous coal of 40% ash content, Germany Saarland bituminous coal of 10.5% ash content and 14% ash content bituminous coal from the Middleburg opencast mines, South Africa, were used for the investigation. Performed investigations demonstrate that regardless of the coal quality the plasma assisted coal gasification allows obtaining a pure synthesis gas at a ratio of H2:CO≥1.
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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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Lu, Xijia, and Ting Wang. "Effect of Radiation Models on Coal Gasification Simulation." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86997.

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Adequate modeling of radiation heat transfer is important in CFD simulation of coal gasification process. In an entrained-flow gasifer, the non-participating effect of coal particles, soot, ashes, and reactive gases could significantly affect the temperature distribution in the gasifier and hence affects the local reaction rate and life expectancy of wall materials. For slagging type gasifiers, radiation further affects the forming process of corrosive slag on the wall which can expedite degradation of the refractory lining in the gasifier. For these reasons, this paper focuses on investigating applications of five different radiation models to coal gasification process, including Discrete Transfer Radiation Model (DTRM), P-1 Radiation Model, Rosseland Radiation Model, Surface-to-Surface (S2S) Radiation Model, and Discrete Ordinates (DO) Radiation Model. The objective is to identify the pros and cons of each model’s applicability to the gasification process and determine which radiation model is most appropriate for simulating the process in entrained-flow gasifiers. The Eulerian-Lagrangian approach is applied to solve the Navier-Stokes equations, nine species transport equations, and seven global reactions consisting of three heterogeneous reactions and four homogeneous reactions. The coal particles are tracked with the Lagrangian method. Six cases are studied—one without the radiation model and the other five with different radiation models. The result reveals that the various radiation models yield uncomfortably large uncertainties in predicting syngas composition, syngas temperature, and wall temperature. The Rosseland model does not yield reasonable and realistic results for gasification process. The DTRM model predicts very high syngas and wall temperatures in the dry coal feed case. In the one-stage coal slurry case, DTRM result is close to the S2S result. The P1 method seems to behave stably and is robust in predicting the syngas temperature and composition; it yields the result most close to the mean, but it seems to underpredict the gasifier’s inner wall temperature.
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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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Valmundsson, Arnar S., and Isam Janajreh. "Plasma Gasification Process Modeling and Energy Recovery From Solid Waste." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54284.

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In recent studies, plasma gasification has shown great potential as an effective method for solid waste treatment and energy recovery. In this study, a plasma gasification process is simulated based on a chemical equilibrium model developed in Aspen Plus. The model takes into account the properties of different feedstock, used for gasification, and the input plasma energy and evaluates the output syngas composition following a Gibbs free energy minimization approach. The model is used to evaluate plasma gasification of three types of feedstock i.e. industrial waste (shredded tires), construction waste (plywood), and baseline bituminous coal. The process is optimized for two different types of plasma gas: air and steam. Process metrics are evaluated and compared for the considered feedstock. Results showed an obtained plasma gasification efficiency of 46.4% for shredded tires and 41.1% for plywood and bituminous coal. Energy recovery potential is also evaluated using an integrated plasma gasification combined cycle (IPGCC) power plant model. Thermal efficiencies of the process are evaluated and compared for the different feedstock. Plasma gasification of waste tire material resulted in an energy efficiency of 28.5%, while the efficiency for coal and plywood was lower at 20.0% and 18.3%, respectively.
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Bielowicz, Barbara. "THE INFLUENCE OF CHEMICAL COMPOSITION OF ASH ON THE COAL GASIFICATION PROCESS." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017h/43/s19.069.

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Reports on the topic "Coal gasification process"

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Walia, D. S., and K. C. Srivastava. Development of biological coal gasification (MicGAS Process). Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10185722.

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Hill, A. H., R. A. Knight, G. L. Anderson, H. L. Feldkirchner, and S. P. Babu. Fundamental research on novel process alternatives for coal gasification: Final report. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/6747535.

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Srivastava, K. C. Development of Biological Coal Gasification (MicGAS Process). Topical report, July 1991--February 1993. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10104584.

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Winnick, J. High Temperature Electrochemical Polishing of H(2)S from Coal Gasification Process Streams. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/643584.

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Winnick, J. High temperature electrochemical separation of H sub 2 S from coal gasification process streams. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/7205446.

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Winnick, J. High temperature electrochemical separation of H sub 2 S from coal gasification process streams. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5670437.

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Srivastava, K. C. Development of biological coal gasification (MicGAS Process). Fifteenth quarterly report, [January 1, 1994--March 31, 1994]. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10154515.

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Javad Abbasian, Armin Hassanzadeh Khayyat, and Rachid B. Slimane. Development of Highly Durable and Reactive Regenerable Magnesium-Based Sorbents for CO2 Separation in Coal Gasification Process. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/876546.

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Jack Winnick and Meilin Liu. HIGH TEMPERATURE REMOVAL OF H{sub 2}S FROM COAL GASIFICATION PROCESS STREAMS USING AN ELECTROCHEMICAL MEMBRANE SYSTEM. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/823016.

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Meyer, Howard. Development of an Integrated Multi-Contaminant Removal Process Applied to Warm Syngas Cleanup for Coal-Based Advanced Gasification Systems. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1053621.

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