On the concentration dependence of diffusion coefficients in zeolites



Ruthven (1976) published thermodynamic and kinetic data on the adsorption of five gases in zeolites over a wide range of temperatures and concentrations. We have described zeolite diffusivities with a model based on the discrete structure of zeolite crystals and a statistic-thermodynamic evaluation of equilibrium measurements (Fiedler and Celbin 1978). Prof. Ruthven has kindly sent us tables of results for all systems in his paper, which we analyze below.