Abstract
The problem of determining the optimal catalyst activity distribution for selectivity maximization in nonisothermal flat, cylindrical or spherical pellets is solved for the case of parallel reactions with arbitrary kinetics. It is shown that the optimal catalyst distribution is an appropriately chosen Dirac δ-function. Simple analytical expressions are derived for the optimal catalyst location in terms of the pertinent physicochemical parameters. Global pellet selectivities obtained with optimal catalyst profiles are shown to be substantially higher than those obtained with uniformly activated pellets.
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