= Weisz–Prater criterion
{wiki=Weisz–Prater_criterion}
The Weisz–Prater criterion is a dimensionless number used in the field of chemical engineering and catalysis to assess the effectiveness of diffusion processes in heterogeneous catalytic reactions. It is particularly important when analyzing catalytic reactions occurring on solid catalysts, as it helps determine whether the reaction is limited by the intraparticle diffusion of reactants into the catalyst or if it is primarily driven by the reaction kinetics on the surface.
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