Kinetic study of the gasification of an Australian bituminous coal char in carbon dioxide

Experimental work was carried out to study the kinetics of the carbon dioxide gasification of a coal char. The coal char was prepared from an Australian bituminous coal by pyrolyzing it at 900 °C in a tube furnace for 9 min in inert environment. The coal char was gasified in a thermo-gravimetric analyzer (TGA) with a mixture of carbon dioxide and nitrogen. The effects of gasification temperature (800-875 °C) and carbon dioxide concentration (10-80%) were studied. In the present study the reaction rate of the pyrolyzed coal was obtained and interpreted by Random pore model.

[1]  K. Heek,et al.  Aspects of coal properties and constitution important for gasification , 1985 .

[2]  Hiromi Yamashita,et al.  Combustion and CO2 gasification of coals in a wide temperature range , 1993 .

[3]  K. H. van Heek,et al.  Comparison of the gasification behaviour of a West and East German Brown coal , 1993 .

[4]  B. M. Gibbs,et al.  Gasification kinetics of an Indonesian sub-bituminous coal-char with CO2 at elevated pressure , 2001 .

[5]  Shiro Kajitani,et al.  CO2 gasification rate analysis of coal char in entrained flow coal gasifier , 2006 .

[6]  Thomas F. Edgar,et al.  Underground coal gasification , 1978 .

[7]  S. D. Kim,et al.  Reaction kinetics of char—CO2 gasification , 1988 .

[8]  C. Y. Wen,et al.  Reactivity of Coal and Char. 1. In Carbon Dioxide Atmosphere , 1977 .

[9]  D. G. Roberts,et al.  A kinetic analysis of coal char gasification reactions at high pressures , 2006 .

[10]  L. Douglas Smoot,et al.  Effect of coal type on entrained gasification , 1986 .

[11]  Hiromitsu Matsuda,et al.  Gasification rate analysis of coal char with a pressurized drop tube furnace , 2002 .

[12]  Evan Diamadopoulos,et al.  The effect of mineral matter and pyrolysis conditions on the gasification of Greek lignite by carbon dioxide , 1996 .

[13]  Tadafumi Adschiri,et al.  Characterization of coal char gasification rate , 1991 .

[14]  D. G. Roberts,et al.  Char Gasification with O2, CO2, and H2O: Effects of Pressure on Intrinsic Reaction Kinetics , 2000 .

[15]  Aik Chong Lua,et al.  Experimental and Kinetic Studies on Pore Development During CO2 Activation of Oil-Palm-Shell Char , 2001 .

[16]  A. Cousins,et al.  An investigation of the reactivity of chars formed in fluidized bed gasifiers: the effect of reaction conditions and particle size on coal char reactivity , 2006 .

[17]  Robert Anderson,et al.  Gasification reactivity of Canadian anthracite and semi-anthracite chars , 1986 .

[18]  D. D. Perlmutter,et al.  A random pore model for fluid‐solid reactions: I. Isothermal, kinetic control , 1980 .

[19]  John B. Agnew,et al.  Gasification of a South Australian low-rank coal with carbon dioxide and steam: kinetics and reactivity studies , 1998 .

[20]  Karen J. Shaw,et al.  Thermogravimetric determination of the carbon dioxide reactivity of char from some New Zealand coals and its association with the inorganic geochemistry of the parent coal , 1998 .

[21]  M. Cassanello,et al.  CO2 gasification of Argentinean coal chars: a kinetic characterization , 2001 .