Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지

A Study of Coal Gasification Process Modeling

석탄가스화 공정 모델링에 관한 연구

  • 이중원 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 김미영 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 지준화 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 김시문 (한국전력공사 전력연구원 수화력발전연구소) ;
  • 박세익 (한국전력공사 전력연구원 수화력발전연구소)
  • Received : 2010.08.18
  • Accepted : 2010.10.20
  • Published : 2010.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Integrated gasification combined cycle (IGCC) is an efficient and environment-friendly power generation system which is capable of burning low-ranked coals and other renewable resources such as biofuels, petcokes and residues. In this study some process modeling on a conceptual entrained flow gasifier was conducted using the ASPEN Plus process simulator. This model is composed of three major steps; initial coal pyrolysis, combustion of volatile components, and gasification of char particles. One of the purposes of this study is to develop an effective and versatile simulation model applicable to numerous configurations of coal gasification systems. Our model does not depend on the hypothesis of chemical equilibrium as it can trace the exact reaction kinetics and incorporate the residence time calculation of solid particles in the reactors. Comparisons with previously reported models and experimental results also showed that the predictions by our model were pretty reasonable in estimating the products and the conditions of gasification processes. Verification of the accuracy of our model was mainly based upon how closely it predicts the syngas composition in the gasifier outlet. Lastly the effects of change oxygen are studied by sensitivity analysis using the developed model.

Keywords

References

  1. C.-Y. Wen, T.-Z. Chung, "Entrained coal gasification modeling", Ind. Eng. Chem. Process Des. Dev., 18, 1979, p. 684. https://doi.org/10.1021/i260072a020
  2. Govind R, Shah J., "Modeling and simulation of an entrained flow coal gasifier", AIChe J. 30(1), 1984, p. 79. https://doi.org/10.1002/aic.690300113
  3. Higman C, Van der Burgt M, "Gasification", 2nd, 2003.
  4. Christopher Frey H, Akunuri N., "Probabilistic modeling and evaluation of the perfomance, emissions, and cost of texaco gasifier-based integrated gasification combined cycle system using ASPEN", http://www4.ncsu.edu/~frey/reports/Frey_akumuri_2001.pkf, 2001.
  5. Martinez E., Vicente W., Salinas-vazquez M., "Simulation of an integrated gasifier combined cycle stream", Information technology (6), 2006, p. 141.
  6. Nathen SV, Kirkpatrick RD, Young BR, "Gasification of New Zealand coal: a comparative simulation study", Energy Fuels, 22, 2008, pp. 2687. https://doi.org/10.1021/ef700704n
  7. Uson S, Valero A, Correas L, Matinea A, "Cogasification of coal and bimass in an IGCC power plant: gasifier modeling", Chen Eng Sci, 55, 2000, p. 3861. https://doi.org/10.1016/S0009-2509(00)00030-0
  8. Chen C, Horio M, Kojima T, "Numerical simulation of entrained flow coal gasifier Part I : modeling of coal gasification in an entrained flow gasifier", Chem Eng Sci, 55, 2000, 3861. https://doi.org/10.1016/S0009-2509(00)00030-0
  9. Petersen I, Werther J., "Experimental investigation and modeling of gasification of sewage sludge in the cirulation fluidized bed", Chem Eng Sci, 44, 2005, 717.
  10. Brown D, Fuchino T, Marechal F, "Solid fuel decomposition modeling for the design of biomass gasification system", Elsevier, 2005, p. 1661.
  11. Robinson PJ. Luyben WL., "Simple dynamic gasifier model that runs in aspen dynamics", Ind Eng Chem Res., 47, 2008, p. 7784. https://doi.org/10.1021/ie800227n
  12. M-Perez-Fortes, A.D. Bojarski, E. Velo, J.M. Nougues, L.Puigjaner, "Conceptual model and evlauation of generated power and emissions in an IGCC plant", Energy, 34, 2009, p. 1721. https://doi.org/10.1016/j.energy.2009.05.012
  13. Erico Biagini, "Development of an Entrained flow Gasifer Model for Process Sptimization Study", Ind. Eng. Chem. 48, 2009, p. 9028. https://doi.org/10.1021/ie801804g
  14. ASPEN Technology, Inc. "ASPEN Plus Model for Entrained Flow Coal Gasifier", V7.2, http://support.aspentech.com.
  15. E.M. Sunberg, W.A. Peters, J.B. Howard, "Product composition and kinetics of lignite pyrolysis", Ind. Eng. Chem. 17, 1978, p. 37. https://doi.org/10.1021/i260065a008
  16. Junhwa Chi, "Char Gasification Model Incuding the Effects of Pore Structure and Solid Reaction Product", Trans. of the Korean Hydrogen and New Energy Society, Vol. 21, No. 4, 2010, p. 328.