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Self-diffusion of simple alcohols in heterionic forms of LTA zeolites

Dyer, A; Amini, S

Authors

A Dyer

S Amini



Abstract

Radiotracers have been used to follow molecular diffusion of ethyl and n-butyl alcohols in LTA zeolite crystallites under the conditions of liquid phase sorption. Evidence of a two-stage process has been observed. In the case of ethyl alcohol movement this prevented the estimation of energy barriers to molecular migration. Estimates were possible when n-butyl alcohol was the labelled species. The effect of the presence of Mg, Ca, Sr, Zn, Na, Li, K, and H cations was studied. It was concluded that the mobility of unbound alcohol molecules contributed to the initial diffusion process and that the second process was associated with alcohol molecules in some form of solvation shield round the cations present in the larger zeolite cages. Comparisons to literature data for molecules moving in the gaseous phase through zeolites were made, and this enabled suggestions of the mechanism for movements of molecules through zeolites in the liquid phase.

Citation

Dyer, A., & Amini, S. (2001). Self-diffusion of simple alcohols in heterionic forms of LTA zeolites. Microporous and Mesoporous Materials, 46(2-3), 163-176. https://doi.org/10.1016/S1387-1811%2801%2900280-3

Journal Article Type Article
Publication Date Aug 1, 2001
Deposit Date Aug 24, 2007
Journal Microporous and Mesoporous Materials
Print ISSN 1387-1811
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 46
Issue 2-3
Pages 163-176
DOI https://doi.org/10.1016/S1387-1811%2801%2900280-3
Keywords Molecular diffusion; Alcohols; Cations; Liquid phase
Publisher URL http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TH4-43F657C-3&_user=899537&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000047642&_version=1&_urlVersion=0&_userid=899537&md5=91413fca8bb97555b6b27de4245d4b4c


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