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Catalytic isobutane dehydrogenation in a dense silica membrane reactor

Ioannides, T. and Gavalas, G. R. (1993) Catalytic isobutane dehydrogenation in a dense silica membrane reactor. Journal of Membrane Science, 77 (2-3). pp. 207-220. ISSN 0376-7388.

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The dehydrogenation of isobutane on a commercial chromia-alumina catalyst was studied using a conventional and a membrane reactor. A series of differential runs were conducted varying the temperature and feed composition. Extensive loss of catalyst activity was observed within the first two or three hours on stream and this deactivation intensified with temperature and olefin content but was inhibited by hydrogen. The membrane reactor utilized a dense silica membrane prepared by chemical vapor deposition on a porous Vycor substrate. The membrane permeance as 0.3 cm^3/cm^2-min-atm and the hydrogen to hydrocarbon permeance ratio was 80–300. Integral runs were conducted to compare the performance of the membrane reactor with that of a conventional reactor. At all temperatures and space times the membrane reactor gave higher isobutene yield and selectivity, the difference increasing with the space time. The membrane exhibited stable permeance and permselectivity during several days of operation.

Item Type:Article
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Gavalas, G. R.0000-0003-1468-6835
Additional Information:© 1993 Elsevier. The authors appreciate the funding of this project by Shell Development Company.
Funding AgencyGrant Number
Shell Development CompanyUNSPECIFIED
Subject Keywords:membrane reactor; silica membrane; isobutane dehydrogenation; chromia-alumina catalyst; catalyst deactivation
Issue or Number:2-3
Record Number:CaltechAUTHORS:20151007-090428811
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Official Citation:T. Ioannides, G.R. Gavalas, Catalytic isobutane dehydrogenation in a dense silica membrane reactor, Journal of Membrane Science, Volume 77, Issue 2, 1993, Pages 207-220, ISSN 0376-7388, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60854
Deposited By: George Porter
Deposited On:07 Oct 2015 17:31
Last Modified:03 Oct 2019 09:01

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