Nonuniformly Activated Catalysts

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Abstract
In most theoretical and experimental studies in the area of heterogeneous catalysis, the distribution of catalytically active material within three-dimensional carriers has been assumed to be uniform. An extensive literature exists [1, 2] dealing with interactions between chemical and physical transport phenomena within such porous catalysts. The effects of intraparticle mass and heat diffusional resistances in catalysts exhibiting uniform activity distributions have been extensively studied in terms of point and overall effectiveness, selectivity, and yield, as well as in terms of concentration and temperature profiles within catalyst particles and chemical reactors.