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Lookup NU author(s): Dr Danai Poulidi, Professor Ian Metcalfe
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A dual chamber membrane reactor was used in order to study the effect of macroscopically applied oxygen chemical potential differences to a platinum catalyst supported on a mixed oxygen ion and electronic conducting membrane. It is believed that the oxygen chemical potential difference imposed by the use of an oxygen sweep in one of the reactor chambers causes the back-spillover of oxygen species from the support onto the catalyst surface, resulting in the modification of the catalytic activity. The use of different sweep gases, such as ethylene and hydrogen was investigated as the means to reverse the rate modification by removing the spilt over species from the catalyst surface and returning the system to its initial state. Oxygen sweep in general had a positive effect on the reaction rate with rate increases up to 20% measured. Experimental results showed that hydrogen is a more potent sweep gas than ethylene in terms of the ability to reverse rate modification. A 10% rate loss was observed when using an ethylene sweep as compared with an almost 60% rate decrease when hydrogen was used as the sweep gas. (C) 2009 Elsevier Ltd. All rights reserved.
Author(s): Poulidi D, Metcalfe IS
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Chemical Engineering Science: 20th International Symposium on Chemical Reaction Engineering
Year of Conference: 2010
Pages: 446-450
ISSN: 0009-2509
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/j.ces.2009.06.013
DOI: 10.1016/j.ces.2009.06.013
Library holdings: Search Newcastle University Library for this item
ISBN: 18734405
