Pore and solid diffusion models for fixed‐bed adsorbers

Thomas Weber, Ranjit K. Chakravorti

1974 · AIChE Journal · 2,558 citations

Abstract Most models for fixed bed adsorbers have used either the homogeneoussolid or pore diffusion model for the pellets. When the adsorption isotherm is linear, the two models can lead to identical breakthrough curves. The conditions for this equivalence are presented here. It is shown that one of the bulk flow factors that was included in the formulation of one pore diffusion model will be significant only for feedstreams containing a relatively high concentration of adsorbate. The prosity factor of the pore model is shown to be very important, especially as the porosity decreases. The im…

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