Elsevier

Journal of Catalysis

Volume 73, Issue 2, February 1982, Pages 366-376
Journal of Catalysis

A novel reactor system that permits the direct determination of deactivation kinetics for a heterogeneous catalyst

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Abstract

This reactor system consists of a differential reactor and a single-pellet reactor both with external recycle of the inlet feed. The design and operation of these two reactors permit direct determination of the deactivation kinetics for a heterogeneous catalyst and a better value for the initial reaction rate. Direct determination of deactivation kinetics is not possible in systems operating at constant space velocity because the reaction mixture composition varies with time. For the system presented in this paper deactivation data are obtained at constant reaction mixture composition by varying the space velocity to compensate for catalyst deactivation. Feed rates, recycle rates, and reactor system volumes in our system are designed to minimize system response time which for this system is on the order of a few seconds. To demonstrate the operation of this novel reactor system, the fouling of a platinum catalyst was studied using a model reaction.

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