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Fluidised bed gasification of a metallurgical coke with CO 2 /N 2 Mixtures
Author(s) -
Stubington John F.,
Barrett Denis,
Duong H. Thanh
Publication year - 1985
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450630610
Subject(s) - coke , thermodynamics , flow (mathematics) , materials science , range (aeronautics) , metallurgy , volumetric flow rate , chemistry , mechanics , composite material , physics
The gasification of a metallurgical coke with CO 2 /N 2 mixtures in a 0.1 m diameter fluidised bed has been studied over the temperature range 810–1050°C. The rate of gasification was found to be essentially kinetically controlled, with negligible influence of fluidisation parameters below 1000°C. A number of flow models were assessed. The plug flow model was found to be the simplest model which could predict the experimental results, giving similar results to the more complex two‐phase flow model of Davidson and Harrison (1963). For the range of conditions studied, the simple n th order reaction model was used to determine a best value of the reaction order of 0.8. For this combination of flow and reaction models, an activation energy of 197 kJ/mol was deduced from the experiments, in agreement with packed bed results and literature data. Very simple models can be used to predict the experimental results within the range studied.