Abstract
We have used molecular simulations to examine the diffusion of Ne, Ar, Kr, Xe, CH4, CF4, CCl4, SF6, SnCl4, and SnBr4 in the molecular sieve AlPO4-5, both as single species and as coadsorbed mixtures. Single adsorbed species exhibit a transition from normal to single-file diffusion as a function of increasing adsorbate size. In addition to normal and single-file diffusion, coadsorbed mixtures exhibit a qualitatively new diffusion mode in which one species performs normal diffusion while the other undergoes single-file diffusion. We discuss the prospects for experimental verification of this phenomenon, and present measurements of the loading dependence of diffusion rates during the dual-mode diffusion of Ne/CF4 mixtures.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:25 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 7, 2024, 6:28 a.m.) |
Indexed | 1 month ago (July 28, 2025, 5:43 p.m.) |
Issued | 27 years, 11 months ago (Sept. 15, 1997) |
Published | 27 years, 11 months ago (Sept. 15, 1997) |
Published Print | 27 years, 11 months ago (Sept. 15, 1997) |
@article{Sholl_1997, title={Normal, single-file, and dual-mode diffusion of binary adsorbate mixtures in AlPO4-5}, volume={107}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.474779}, DOI={10.1063/1.474779}, number={11}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Sholl, David S. and Fichthorn, Kristen A.}, year={1997}, month=sep, pages={4384–4389} }