Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 33, Issue 3, Pages 213-254Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1383-5866(03)00008-X
Keywords
adsorption; diffusion; Monte Carlo simulations; molecular dynamics; Maxwell-Stefan theory; membrane permeation; chromatography
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The Maxwell-Stefan (M-S) formulation is shown to be the most convenient and general way of describing diffusion within zeolite structures. This theory goes a long way to explain the observed various types of dependencies of the Fick diffusivity with sorbate loading. For mixture diffusion within zeolites, the M-S theory provides clues for the development of novel separation techniques that rely on diffusion selectivity. We illustrate this aspect by considering a number of practical applications in membrane permeation and chromatographic separations. (C) 2003 Elsevier B.V. All rights reserved.
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