Modeling of High-Ash Coal Gasification in an Entrained-Flow Gasifier and an IGCC Plant
Publication: Journal of Energy Engineering
Volume 142, Issue 4
Abstract
Gasification of high-ash coal in dry and slurry entrained flow gasifiers is investigated through equilibrium modeling. Effects of oxygen- and steam-to-coal mass flow rate ratios in a dry-fed gasifier and also the effect of water concentration in slurry on composition, temperature, heating value, and cold gas efficiency are studied. It is observed that adding steam to the gasifier reduces oxygen consumption, and the optimum ratio of oxygen-to-coal mass flow (O/F) decreases. At high enough O/F ratios, the steam-to-coal mass flow (S/F) and water-to-coal mass flow (W/F) ratios have no significant influences on gasifier efficiency. It is also observed that for coal, which has a high ash content, dry-fed gasification is preferable. In this type of gasifier, optimum O/F and S/F ratios with respect to cold gas efficiency are determined to be 0.5 and 0.8, respectively. Simulation of the integrated gasification combined cycle (IGCC) in Thermoflow indicates that, for a typical 450-MW combined cycle, of coal is required to produce a net power of 385 MW.
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References
Annamalai, K., and Puri, I. K. (2002). Advanced thermodynamic engineering, CRC Press, FL.
Aydar, E., Gul, S., Unlu, N., Akgun, F., and Livatyali, H. (2014). “Effect of the type of gasifying agent on gas composition in a bubbling fluidized bed reactor.” J. Energy Inst., 87(1), 35–42.
Baratieri, M., Fiori, P. B. L., and Grigiante, M. (2008). “Biomass as an energy source: Thermodynamic constraints on the performance of the conversion process.” Bioresour. Technol., 99(15), 7063–7073.
Bell, D. A., Towler, B. F., and Fan, M. (2010). Coal gasification and its applications, William Andrew, Norwich, NY.
Bridgwater, A. V. (1995). “The technical and economic feasibility of biomass gasification for power generation.” Fuel, 74(5), 631–653.
Cau, G., Tola, V., and Deiana, P. (2014). “Comparative performance assessment of USC and IGCC power plants integrated with capture systems.” Fuel, 116(1), 820–833.
Channiwala, S. A., and Parikh, P. P. (2002). “A unified correlation for estimating HHV of solid, liquid and gaseous fuels.” Fuel, 81(8), 1051–1063.
Chen, C., Horio, M., and Kojima, T. (2000). “Numerical simulation of entrained flow coal gasifiers. Part I: Modeling of coal gasification in an entrained flow gasifier.” Chem. Eng. Sci., 55(18), 3861–3874.
Chen, C.-J., Hung, C.-I., and Chen, W.-H. (2012). “Numerical investigation on performance of coal gasification under various injection patterns in an entrained flow gasifier.” Appl. Energy, 100(1), 218–228.
Choi, Y.-C., Park, T.-J., Kim, J.-H., Lee, J.-G., Hong, J.-C., and Kim, Y.-G. (2001). “Experimental studies of 1 ton/day coal slurry feed type oxygen blown entrained flow gasifier.” Korean J. Chem. Eng., 18(4), 493–498.
Collot, A.-G. (2006). “Matching gasification technologies to coal properties.” Int. J. Coal Geol., 65(3), 191–212.
Crnomarkovic, N., Repic, B., Mladenovic, R., Neskovic, O., and Veljkovic, M. (2007). “Experimental investigation of role of steam in entrained flow coal gasification.” Fuel, 86(1), 194–202.
Dai, Z., Gong, X., Guo, X., Liu, H., Wang, F., and Yu, Z. (2008). “Pilot-trial and modeling of a new type of pressurized entrained-flow pulverized coal gasification technology.” Fuel, 87(10), 2304–2313.
de Souza-Santos, M. L. (2004). Solid fuels combustion and gasification, Marcel Dekker, New York.
Ghassemi, H., and Shahsavan-Markadeh, R. (2014). “Effects of various operational parameters on biomass gasification process: A modified equilibrium model.” Energy Convers. Manage., 79(1), 18–24.
Gordon, S., and McBride, B. J. (1994). “Computer program for calculation of complex chemical equilibrium compositions and applications. I. Analysis.” NASA Lewis Research Center, Cleveland.
Higman, C., and Burgt, M. V. D. (2008). Gasification, Gulf Professional Publishing, Burlington, MA.
Iyengar, R. K., and Haque, R. (1991). “Gasification of high-ash Indian coals for power generation.” Fuel Process. Technol., 27(3), 247–262.
Jarungthammachote, S., and Dutta, A. (2008). “Equilibrium modeling of gasification: Gibbs free energy minimization approach and its application to spouted bed and spout-fluid bed gasifiers.” Energy Convers. Manage., 49(6), 1345–1356.
Jorjani, E., Chelgani, S. C., and Mesroghli, S. (2008). “Application of artificial neural networks to predict chemical desulfurization of Tabas coal.” Fuel, 87(12), 2727–2734.
Joshi, M. M., and Lee, S. (1996). “Integrated gasification combined cycle: A review of IGCC technology.” Energy Sources, 18(5), 537–568.
Kim, S. K., Park, J. Y., Lee, D. K., Hwang, S. C., Lee, S. H., and Rhee, Y. W. (2015). “Kinetic study on low-rank coal char: Characterization and catalytic gasification.” J. Energy Eng., 04015032.
Kunze, C., and Spliethoff, H. (2011). “Modelling, comparison and operation experiences of entrained flow gasifier.” Energy Convers. Manage., 52(5), 2135–2141.
Lee, J. C., Lee, H. H., Joo, Y. J., Lee, C. H., and Oh, M. (2014). “Process simulation and thermodynamic analysis of an IGCC (integrated gasification combined cycle) plant with an entrained coal gasifier.” Energy, 64(1), 58–68.
Li, X. T., Grace, J. R., Lim, C. J., Watkinson, A. P., Chen, H. P., and Kim, J. R. (2004). “Biomass gasification in a circulating fluidized bed.” Biomass Bioenergy, 26(2), 171–193.
Liszka, M., Malik, T., Budnik, M., and Ziebik, A. (2013). “Comparison of IGCC (integrated gasification combined cycle) and CFB (circulating fluidized bed) cogeneration plants equipped with .” Energy, 58(1), 86–96.
Majoumerd, M. M., Raas, H., De, S., and Assadi, M. (2014). “Estimation of performance variation of future generation IGCC with coal quality and gasification process: Simulation results of EU H2-IGCC project.” Appl. Energy, 113(1), 452–462.
Maurstad, O., Herzog, H., Bolland, O., and Beér, J. (2006). “Impact of coal quality and gasifier technology on IGCC performance.” 8th Int. Conf. on Greenhouse Gas Control Technologies, IEA Greenhouse Gas R&D Programme (IEAGHG), Cheltenham, U.K.
Mayerhofer, M., Mitsakis, P., Meng, X., de Jong, W., Spliethoff, H., and Gaderer, M. (2012). “Influence of pressure, temperature and steam on tar and gas in allothermal fluidized bed gasification.” Fuel, 99(1), 204–209.
Nag, P. K., and De, S. (1998). “Study of thermodynamic performance of an integrated gasification combined cycle power plant.” Proc. Inst. Mech. Eng. Part A, J. Power Energy, 212(2), 89–95.
Park, S. H., Chung, S. W., Lee, S. K., Choi, H. K., and Lee, S. H. (2015). “Thermo-economic evaluation of 300 MW class integrated gasification combined cycle with ash free coal (AFC) process.” Appl. Therm. Eng., 89(1), 843–852.
Prins, M. J., Ptasinski, K. J., and Janssen, F. J. J. G. (2003). “Thermodynamics of gas-char reactions: First and second law analysis.” Chem. Eng. Sci., 58(3–6), 1003–1011.
Promes, E., Woudstra, T., Schoenmakers, L., Oldenbroek, V., Thattai, A. T., and Aravind, P. (2015). “Thermodynamic evaluation and experimental validation of 253MW integrated coal gasification combined cycle power plant in Buggenum, Netherlands.” Appl. Energy, 155(1), 181–194.
Shabbar, S., and Janajreh, I. (2013). “Thermodynamic equilibrium analysis of coal gasification using Gibbs energy minimization method.” Energy Convers. Manage., 65(1), 755–763.
Singh, N., Raghavan, V., and Sundararajan, T. (2013). “Effect of coal properties on gasification of high-ash Indian coals.” 9th Asia-Pacific Conf. on Combustion, Korean Combustion Society, Gyeongju, Korea.
Smith, J. M., Ness, H. C. V., and Abbott, M. M. (2005). Introduction to chemical engineering thermodynamics, McGraw-Hill, New York.
Yan, F., Luo, S.-Y., Hu, Z.-Q., Xiao, B., and Cheng, G. (2010). “Hydrogen-rich gas production by steam gasification of char from biomass fast pyrolysis in a fixed-bed reactor: Influence of temperature and steam on hydrogen yield and syngas composition.” Bioresour. Technol., 101(14), 5633–5637.
Yoshida, H., Kiyono, F., Tajima, H., Yamasaki, A., Ogasawara, K., and Masuyama, T. (2008). “Two-stage equilibrium model for a coal gasifier to predict the accurate carbon conversion in hydrogen production.” Fuel, 87(10), 2186–2193.
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© 2016 American Society of Civil Engineers.
History
Received: Jun 11, 2015
Accepted: Sep 16, 2015
Published online: Jan 4, 2016
Discussion open until: Jun 4, 2016
Published in print: Dec 1, 2016
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