Transient diffusion, adsorption and reaction in porous catalysts: The reaction controlled, quasi-steady catalytic surface

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Abstract

The process of transient diffusion, adsorption and heterogeneous reaction in porous catalysts is analysed using the method of volume averaging. The analysis illustrates under what circumstances the effective diffusivity tensor is independent of the adsorption and reaction process, and thus indicates when effective diffusivities determined in passive systems can be used in the analysis of active systems. Normal mode analysis is used to determine under what conditions the process can be described in terms of a reaction controlled, quasi-steady catalytic surface.

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    Permanent address: Department of Chemical Engineering, University of California at Davis, Davis, CA 95616, U.S.A.

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