Numerical Investigations of CO/CO2 Ratio in Char Combustion

作者: Wei He , Rong He , Takamasa Ito , Toshiyuki Suda , Jun'ichi Sato

DOI: 10.1080/00102202.2011.569803

关键词:

摘要: The CO/CO2 ratio of reactions during char combustion was investigated numerically. simulations used the pore model with fractal properties, a gas diffusion suitable for pores, and carbon-oxygen reaction to describe oxidation. in primary derived assuming Gaussian distributions activation energies Maxwell distribution oxygen molecular velocity. numerical various particle sizes, structures, temperatures revealed that effects secondary structure on are main reasons why different researchers obtain experimental results ratio.

参考文章(35)
Peter Pfeifer, David Avnir, Chemistry in noninteger dimensions between two and three. I. Fractal theory of heterogeneous surfaces Journal of Chemical Physics. ,vol. 79, pp. 3558- 3565 ,(1983) , 10.1063/1.446210
Roger Phillips, F.J. Vastola, P.L. Walker, Factors affecting the product ratio of the carbon-oxygen reaction—II. Reaction temperature Carbon. ,vol. 8, pp. 205- 210 ,(1970) , 10.1016/0008-6223(70)90115-6
Kalyan Annamalai, William Ryan, Interactive processes in gasification and combustion—II. Isolated carbon, coal and porous char particles Progress in Energy and Combustion Science. ,vol. 19, pp. 383- 446 ,(1993) , 10.1016/0360-1285(93)90010-C
PAUL F. LEWIS, GIRARD A SIMONS, Char Gasification: Part II. Oxidation Results Combustion Science and Technology. ,vol. 20, pp. 117- 124 ,(1979) , 10.1080/00102207908946901
Robert W. Froberg, Robert Essenhigh, Reaction order and activation energy of carbon oxidation during internal burning Symposium (International) on Combustion. ,vol. 17, pp. 179- 187 ,(1979) , 10.1016/S0082-0784(79)80020-X
J.B. Howard, G.C. Williams, D.H. Fine, Kinetics of carbon monoxide oxidation in postflame gases Symposium (International) on Combustion. ,vol. 14, pp. 975- 986 ,(1973) , 10.1016/S0082-0784(73)80089-X
David Avnir, Dina Farin, Peter Pfeifer, Surface geometric irregularity of particulate materials: the fractal approach Journal of Colloid and Interface Science. ,vol. 103, pp. 112- 123 ,(1985) , 10.1016/0021-9797(85)90082-7
Brian S. Haynes, A turnover model for carbon reactivity I. development Combustion and Flame. ,vol. 126, pp. 1421- 1432 ,(2001) , 10.1016/S0010-2180(01)00263-2
Shakti Goel, Chun Hyuk Lee, John P. Longwell, Adel F. Sarofim, Modeling of ignition and CO oxidation in the boundary layer of a single char particle Energy & Fuels. ,vol. 10, pp. 1091- 1098 ,(1996) , 10.1021/EF9502416