# Dependence of diffusion properties in zeolites Y and A: a search in the sorbate interaction parameter space

Bhattasharjee, Biplab and Yashonath, SubramanIan (1997) Dependence of diffusion properties in zeolites Y and A: a search in the sorbate interaction parameter space. In: Molecular Physics, 90 (6). pp. 889-894.

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## Abstract

Molecular dynamics simulations have been carried out at room temperature on spherical monatomic sorbates in zeolites Y and A. A search has been made in the sorbate Lennard - Jones $\epsilon_{ss}-\sigma_{ss}$ parameter space to see the variation of three properties, namely, rate of intercage di€ usion $(k_c)$, rate of cage visits $(k_v)$ and diffusion coefficient (D). The results suggest that the three properties show a decrease with increase in $\epsilon_{ss}$ for all values of $\sigma_{ss}$ except for $k_c$ at the value of $\sigma_{ss}$ corresponding to the tight fit parameter $\gamma \approx 1$. These results for kc are consistent with earlier work indicating the existence of a diffusion anomaly or a levitation effect. The absence of such behaviour on the part of $k_v$ and D seems to suggest that a diffusion anomaly may be strongly temperature dependent.

Item Type: Journal Article http://dx.doi.org/10.1080/00268979717187... Copyright of this article belongs to the Taylor & Francis Division of Information Sciences > Supercomputer Education & Research CentreDivision of Chemical Sciences > Solid State & Structural Chemistry Unit 27 Mar 2007 19 Sep 2010 04:35 http://eprints.iisc.ernet.in/id/eprint/9878