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Enhancement of heterogeneous autocatalytic reactions by intraparticle diffusion

✍ Scribed by Mirosław Grzesik; Jerzy Skrzypek

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
688 KB
Volume
48
Category
Article
ISSN
0009-2509

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✦ Synopsis

A detailed analysis was carried out concerning the heterogeneous autocatalytic reactions of the type A + B, A + (nl)B + nI3, occurring in chemical reactors and arxompanied by intraparticle diffusion.

The effect of internal diffusion was studied for three basic geometries of a catalyst pellet. The regions-were determined in which the effectiveness factor is much larger than unity. In these regions the presence of an internal resistance to mass transport may lead to serious increase in the overall rate of the heterogeneous autocatalytic reactions. The optimum distribution of the sizes of catalyst pellet was found for some selected reactors, leading to a maximum extent of the heterogeneous autocatalytic reactions.

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