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Sequential gas‐solid reactions
Author(s) -
Fortini Arthur J.,
Perlmutter Daniel D.
Publication year - 1989
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.690351208
Subject(s) - maxima , hydrogen , porous medium , hematite , chemistry , nitrogen , thermodynamics , porosity , atmosphere (unit) , reduction (mathematics) , mineralogy , physics , mathematics , geometry , organic chemistry , art , performance art , art history
A model is developed describing consecutive gas‐solid reactions occurring in porous media. The model calls for independently measurable parameters and predicts two maxima in the reaction rate at intermediate conversions. The low temperature (350°C) reduction of hematite to iron in a hydrogen‐nitrogen atmosphere was used to test the model. The experimental data confirmed the expected rate maxima. The conversion predictions are very close to the data for conversions below 30%, but are systematically somewhat lower than the experimental values for higher levels of conversion. An explanation for the discrepancy is offered in terms of the description of the pore structure.