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Isothermal kinetics of char-coal gasification with pure CO2

Authors
Journal
Fuel
0016-2361
Publisher
Elsevier
Publication Date
Volume
123
Identifiers
DOI: 10.1016/j.fuel.2014.01.066
Keywords
  • Pyrolysis
  • Gasification Kinetics
  • Char Coal
  • Co2
Disciplines
  • Earth Science

Abstract

Abstract The gasification of two kinds of sub-bituminous char-coal in pure CO2 atmosphere has been performed in a thermogravimetric analyzer. The effect of gasification temperature (800–1100°C) and particle size (0.125–1.4mm) has been investigated. Different classical models (homogeneous model, shrinking-core model) have been adopted in order to determine the kinetic constants and the corresponding activation energies. We observed the necessity of including the effect of diffusion through the ash layer and of the non-uniform distribution of solid reactant in order to have a complete description of the conversion vs time curves.

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