Abstract
Criteria expressed in terms of several new dimensionless groups are derived to assess the relative importance of intraparticle and interphase heat and mass transport effects in gas-solid catalysis. An overall criterion incorporating all the effects is also presented. Evaluation of the criteria for typical cases shows that in experimental reactors with low flow rates the relative importance of the effects frequently fall in the order: interphase heat transport > intraparticle mass transport > interphase mass transport > intraparticle heat transport.
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