Modelling heat-and-mass transfer process and chemical reaction of gas-dispersed flow of the pulverized coal particles in high-temperature gasifier

Keywords: steam-oxygen gasification, reactor, coal, pyrolysis, model, syngas, particle


A way to reduce consumption of expensive imported natural gas in the production of chemical products (ammonia, methanol, and other) is the use of synthesis gas, which can be obtained by steam-oxygen gasification of Alexandria dry lignite dust in a high-temperature flow of 4.2 Mpa pressure. For the construction of such devices at conceptual and technical design stages we constructed a model of the working process in the gasifier, by means of which detailed information about the geometrical, aerodynamic, thermal, chemical and physical parameters was obtained: 1) the optimum ratio B0 /BEy = 0,785 and BE^0 /B=y = 0,052 were found providing synthesis gas composition with a high content of combustible components - 93,2%, a low concentration of ballast - 2,8%, the degree of carbon conversion - 99,9% and calorific value - 11,17 MJ/Nm3; 2) as the liquid slag temperature exceeds the liquidity of ash, shotcrete is made as a double-layer (the first layer - silicon carbide mass, the second - stabilized zirconium oxide) across the height of the reactor; 3) The main sources of radiation in the maximum temperature zone are gas - 1595 kJ/(s-m2) and carbon 1161 kJ/(s-m2).

Author Biography

B. Rokhman, Coal Energy Technology Institute NAS of Ukraine


Doctor of Technical Sciences, Leading researcher, Coal Energy Technology Institute NAS of Ukraine,

04070, Kiev, Andreevskaya street 19, Tel.: +38-044-425-53-77, E-mail:

Information about the author: the leading researcher of the Institute of Coal Energy Technologies of the NAS of Ukraine, Doctor of Technical Sciences. Biographical information of Rohman B.B. is published in well-known world directories "Who's Who in Science and Engineering" and "2000 Outstanding Intellectuals of the 21st Century".

Education: Novocherkassk Polytechnic Institute.

Research interests: Mathematical modeling of aerodynamics, heat and mass transfer and chemical reaction of a polydisperse ensemble of solid fuel in the chamber and layer furnaces, in reactors with a circulating fluidized bed and in the fluidized bed.


1. Anthony, D.B., Howard, J.B., Hottel, H.C., and Meissner, H.P. Devolatilization and Hydrogasification of Bituminous Coal//Fuel. - 1976. - Vol. 55. - Pp. 121-128. (Eng)
2. Anthony D.B., and Howard J.B. Coal Devolatilization and Hydrogasification // AIChE. - 1976. - Vol. 22. - Pp. 625¬656.
3. Wen C.Y., Chaung T.Z. Entrainment Coal Gasification Modeling // Ind. Eng. Chem. Process Des. Dev. - 1979. - Vol. 18. - № 4. - Pp. 684-695. (Eng)
4. Annamalai K. and Ryan W. Interactive processes in gasification and combustion. 2. Isolated carbon, coal and porous char particles // Progress in energy and combustion science. - 1993. - Vol. 19(5). - Pp. 383-446. (Eng)
5. Rokhman B.B. Modeling and numerical investigation of the process of vapor-oxygen gasification of solid fuels in a vertical flow reactor under pressure // Journal of Engineering Physics and Thermopysics. - 2014. - Vol. 87. - No. 5. - Pp. 1103¬1115. (Rus)
6. Pomerantsev V.V., Arefev K.I., Akhmedov D.B. et al. Basics of practical combustion theory. - L.: Energoatomisdat, 1986. -312 p. (Rus)
7. Lee, H., Choi, S., Paek, M. A simple process modelling for a dry-feeding entrained bed coal gasifier // Proc. Inst. Mech. Eng. A J. Power Energy. - 2011. - Vol. 225. - Pp. 74-84. (Eng)
8. Ma J., Zitney S.E. CFD modeling of entrained-flow gasifiers with improved physical and chemical submodels // Energy Fuels. -2012. - Vol. 26. - Pp. 7195-7219. (Eng)
9. Gomes-Barea A., Leckner B. Modeling of biomass gasification in fluidized bed // Progress in Energy and Combustion Science. - 2010. - Vol. 36. - Pp. 449-509. (Eng)
10. Westbrook, C.K.; Dryer, F.L. Simplified reaction mechanisms for the oxidation of hydrocarbon fuels in flames // Combust. Sci. Technol. - 1981. - Vol. 27. - Pp. 31-43. (Eng)
11. Jones, W.P.; Lindstedt, R.P. Global reaction schemes for hydrocarbon combustion // Combust. Flame. - 1988. - Vol. 73.-Pp. 233-249. (Eng)
12. Bustanmante, F.; Enick, R.M.; Killmeyer, R.P.; How¬ard, B.H.; Rothenberger, K.S.; Cugini, A.V.; Morreale, B.D.; Ciocco, M. V. Uncatalyzed and wall-catalyzed forward water-gas shift reaction kinetics // AIChE J. - 2005. - Vol. 51. - Pp. 1440¬1454. (Eng)
13. Jess, A. Mechanisms and kinetics of thermal reactions of aromatic hydrocarbons from pyrolysis of solid fuels // Fuel. - 1996. - Vol. 75. - Pp. 1441-1448. (Eng)
14. Turns, S.R. An Introduction to Combustion, Concepts and Applications, 2nd ed.; McGraw-Hill: Singapore. 2006. (Eng)
15. Virks, P.S.; Chambers, L.E.; Woebcke, H.N. Thermal hydrogasification aromatic compounds // Adv. Chem. Ser. - 1974. - Vol. 131. -Pp. 237-258. (Eng)
16. Petersen, I.; Werther, J. Experimental investigation and modeling of gasification of sewage sludge in the circulating fluidized bed // Chem. Eng. Process. - 2005. - Vol. 44. - Pp. 717-736. (Eng)

Abstract views: 46
PDF Downloads: 37
How to Cite
Rokhman, B., Vyfatniuk, V., Vyfatniuk, D., & Kvasnevskyi, A. (2016). Modelling heat-and-mass transfer process and chemical reaction of gas-dispersed flow of the pulverized coal particles in high-temperature gasifier. Vidnovliuvana Energetyka, (3 (46), 13-26. Retrieved from
Complex Problems of Power Systems Based on Renewable Energy Sources