Surprising diffusion behaviour in the restricted regions of silicalite

Yashonath, Subramanian and Bandyopadhyay, Sanjoy (1994) Surprising diffusion behaviour in the restricted regions of silicalite. In: Chemical Physics Letters, 228 (1-3). pp. 284-288.

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Abstract

One of the chief uses of porous materials such as zeolites is in the separation of mixtures of hydrocarbons. Molecular sieve properties of an adsorbate-zeolite system are known to depend on the shape and size of the adsorbate and the dimensions of the channels or cages. Molecular dynamics simulations of simple Lennard-Jones particles in silicalite as a function of the adsorbate diameter show unexpected behaviour; the diffusion coefftcient exhibits a peak when the diameter of the adsorbate approaches the channel diameter. This interesting result implies a breakdown of the geometrical criterion and has far-reaching implications in diverse fields such as diffusion across bio-membranes in cells, separation of mixtures by zeolites and host-guest chemistry.

Item Type:	Journal Article
Publication:	Chemical Physics Letters
Publisher:	Elsevier
Additional Information:	The copyright belongs to Elsevier.
Department/Centre:	Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	14 Jun 2006
Last Modified:	19 Sep 2010 04:29
URI:	http://eprints.iisc.ac.in/id/eprint/7635

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