The gasification of two kinds of sub-bituminous char-coal in pure CO 2 atmosphere has been performed in a thermogravimetric analyzer. The effect of gasification temperature (800-1100 C) and particle size (0.125-1.4 mm) 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. © 2014 Elsevier Ltd. All rights reserved.
Isothermal kinetics of char-coal gasification with pure CO2
Veca, E.
2014-01-01
Abstract
The gasification of two kinds of sub-bituminous char-coal in pure CO 2 atmosphere has been performed in a thermogravimetric analyzer. The effect of gasification temperature (800-1100 C) and particle size (0.125-1.4 mm) 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. © 2014 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
