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Kinetics of high‐temperature carbon gasification reaction
Author(s) -
Desai N. J.,
Yang R. T.
Publication year - 1982
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690280211
Subject(s) - thermal diffusivity , porosity , thermodynamics , reaction rate constant , kinetics , carbon dioxide , chemistry , reaction rate , carbon fibers , chemical kinetics , constant (computer programming) , mineralogy , materials science , composite material , catalysis , organic chemistry , physics , quantum mechanics , composite number , computer science , programming language
A simple technique is developed and is used to measure simultaneously the overall rate and the depth of the reaction zone in the porous solid. It is shown that by using some simple models, one may calculate the intrinsic rate constant and the pore diffusivity from the overall rate and the penetration depth. Models which allow for a varying pore diffusivity according to a linear porosity profile are presented, and have been shown more satisfactory than the constant diffusivity models of Thiele and of Zeldovich when applied to the high temperature carbon‐carbon dioxide reaction.