Understanding Coal Gasification and Combustion Modeling in General Purpose CFD Code

범용 CFD 코드에서 석탄 가스화 및 연소 모델링에 관한 이해

  • Received : 2010.01.25
  • Accepted : 2010.07.01
  • Published : 2010.09.30


The purpose of this study is to assess approaches to modeling coal gasification and combustion in general purpose CFD codes. Coal gasification and combustion involve complex multiphase flows and chemical reactions with strong influences of turbulence and radiation. CFD codes would treat coal particles as a discrete phase and gas species are considered as a continuous phase. An approach to modeling coal reaction in $FLUENT^{(R)}$, selected in this study as a typical commercial CFD code, was evaluated including its devolatilization, gas phase reactions, and char oxidation, turbulence, and radiation submodels. CFD studies in the literature were reviewed to show the uncertainties and limitations of the results. Therefore, the CFD analysis gives useful information, but the results should be carefully interpreted based on understandings on the uncertainties associated with the modelings of coal gasification and combustion.



  1. William Vicente, Salvador Ochoa, Javier Aguillon, and Esteban Barrios, "An Eulerian model for the simulation of an entrained flow coal gasifier", Applied Thermal Engineering, Vol. 23, 2003, pp. 1993-2008 https://doi.org/10.1016/S1359-4311(03)00149-2
  2. Scott C. Hill and L. Douglas Smoot, "A comprehensive three dimensional model for simulation of combustion systems: PCGC-3", Energy and Fuels, Vol. 7, 1993, pp. 874-883 https://doi.org/10.1021/ef00042a025
  3. Stephen E. Zitney and Chris Guenther, "Gasification CFD modeling for advanced power plant simulations", DOE/NETL report, NETL-TPR-1193, 2005
  4. Michael J. Bockelie, Martin K Denison, Zumao Chen, Temi Linjewile, Constance L. Senior, and Adel F. Sarofim, "CFD modeling for entrained flow gasifiers in vision 21 systems", Proceedings of the 19th annual International Pittsburgh coal conference, 2002
  5. D. F. Fletcher, B. S. Haynes, F. C. Christo, and S. D. Joseph, "A CFD based combustion model of an entrained flow biomass gasifier", Applied Mathematical Engineering, Vol. 24, 2000, pp. 165-182
  6. H. Watanabe and M. Otaka, "Numerical simulation of coal gasification in entrained flow coal gasifier", Fuel, Vol. 85, 2006, pp. 1935-1943 https://doi.org/10.1016/j.fuel.2006.02.002
  7. Nick Syred, Katon Kurniawan, Tony Griffiths, Tom Gralton, and Ruby Ray, "Development of fragmentation models for solid fuel combustion and gasification as subroutines for inclusion in CFD codes", Fuel, Vol. 86, 2007, pp. 2221-2231 https://doi.org/10.1016/j.fuel.2007.05.060
  8. M. Kang, D. Seo, S. Lee, J. Hwang, and S. Yim, "Numerical simulation of gasification in an one stage entrained gasifier", Proceedings of the 37th The Korean Society of Combustion Symposium, 2008, pp. 29-35
  9. FLUENT User Manual, Fluent Inc., 2005
  10. L. Douglas Smoot and David T. Pratt, "Pulverized coal combustion and gasification", Plenum Press, New York, 1979
  11. H. Kobayashi, J. B. Howard, and A. F. Sarofim, "Coal devolatilization at high temperatures", Proceedings of the 16th Symposium International on Combustion, 1976, pp. 411-424
  12. Stephen Niksa, Gui-Su Liu, and Robert H. Hurt, "Coal conversion submodels for design applications at elevated pressures. Part I. devolatilization and char oxidation", Progress in Energy and Combustion Science, Vol. 29, 2003, pp. 425-477 https://doi.org/10.1016/S0360-1285(03)00033-9
  13. D. Seo, S. Lee, S. Song, and J. Hwang, "Numerical simulation of gasification of coal-water slurry for production of synthesis gas in a two stage entrained gasifier", Proceedings of the Korean Society for New and Renewable Energy symposium, 2007, pp. 417-423
  14. S. K. Sundaram, K. I. Johnson, J. Matyas, R. E. Williford, S. P. Pilli, and V. N. Korolev, "An integrated approach to coal gasifier testing, modeling, and process optimization", Energy and Fuels, Vol. 23, 2009, pp. 4748-4754 https://doi.org/10.1021/ef900101a
  15. S. S. Sazhin, E. M. Sazhina, O. Faltsi-Saravelou, and P. Wild, "The P-1 model for thermal radiation transfer: advantage and limitations", Fuel, Vol. 75, 1996, pp. 289-294 https://doi.org/10.1016/0016-2361(95)00269-3