Diffusion in tabletted catalysts

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Abstract
A two pore size model is proposed with random arrangement of the dispersed phase (s) and the transient solution and steady state equivalent diffusivity are presented for three new cases. These involve “open micropores,” “blind microprocess” and a combination of the two kinds.The results reveal modeling inconsistencies in the recent literature. The quasi‐steady state is discussed in relation to this phenomenon.A new technique of data analysis involving a combination of transient and steady state methods is proposed. This subjects the transient solution to a much more strenuous test.The results also apply to “barrier” materials.