In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane

Danai Poulidi*, Ian S. Metcalfe

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The electrochemical promotion of a platinum catalyst for ethylene oxidation on a dual chamber membrane reactor was studied. The catalyst was supported on a La0.6Sr0.4Co0.2Fe0.803 membrane. Due the supporting membrane's electronic conductivity it is possible to promote the reaction by controlling the oxygen chemical potential difference across the membrane. Upon establishment of an oxygen potential difference across the membrane, oxygen species can migrate and spillover onto the catalyst surface, modifying the catalytic activity. Initial experiments showed an overall promotion of approximately one order of magnitude of the reaction rate of ethylene, under an oxygen atmosphere on the sweep side of the membrane reactor, as compared with the rate under an inert sweep gas. The reaction rate can keep its promoted state even after the flow of oxygen on the sweep side was interrupted. This behavior caused further promotion with every experiment cycle. The causes of permanent promotion and on demonstrating controllable promotion of the catalytic activity are presented. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

Original languageEnglish
Title of host publicationAIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 2006
Event2006 AIChE Annual Meeting - San Francisco, CA, United States
Duration: 12 Nov 200617 Nov 2006

Conference

Conference2006 AIChE Annual Meeting
CountryUnited States
CitySan Francisco, CA
Period12/11/200617/11/2006

Fingerprint

Catalyst supports
Membranes
Oxygen
Reaction rates
Catalyst activity
Ethylene
Noble Gases
Catalysts
San Francisco
Chemical potential
Platinum
Atmosphere
Experiments
Oxidation
Gases

Cite this

Poulidi, D., & Metcalfe, I. S. (2006). In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane. In AIChE Annual Meeting, Conference Proceedings
Poulidi, Danai ; Metcalfe, Ian S. / In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane. AIChE Annual Meeting, Conference Proceedings. 2006.
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Poulidi, D & Metcalfe, IS 2006, In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane. in AIChE Annual Meeting, Conference Proceedings. 2006 AIChE Annual Meeting, San Francisco, CA, United States, 12/11/2006.

In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane. / Poulidi, Danai; Metcalfe, Ian S.

AIChE Annual Meeting, Conference Proceedings. 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Poulidi, Danai

AU - Metcalfe, Ian S.

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N2 - The electrochemical promotion of a platinum catalyst for ethylene oxidation on a dual chamber membrane reactor was studied. The catalyst was supported on a La0.6Sr0.4Co0.2Fe0.803 membrane. Due the supporting membrane's electronic conductivity it is possible to promote the reaction by controlling the oxygen chemical potential difference across the membrane. Upon establishment of an oxygen potential difference across the membrane, oxygen species can migrate and spillover onto the catalyst surface, modifying the catalytic activity. Initial experiments showed an overall promotion of approximately one order of magnitude of the reaction rate of ethylene, under an oxygen atmosphere on the sweep side of the membrane reactor, as compared with the rate under an inert sweep gas. The reaction rate can keep its promoted state even after the flow of oxygen on the sweep side was interrupted. This behavior caused further promotion with every experiment cycle. The causes of permanent promotion and on demonstrating controllable promotion of the catalytic activity are presented. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

AB - The electrochemical promotion of a platinum catalyst for ethylene oxidation on a dual chamber membrane reactor was studied. The catalyst was supported on a La0.6Sr0.4Co0.2Fe0.803 membrane. Due the supporting membrane's electronic conductivity it is possible to promote the reaction by controlling the oxygen chemical potential difference across the membrane. Upon establishment of an oxygen potential difference across the membrane, oxygen species can migrate and spillover onto the catalyst surface, modifying the catalytic activity. Initial experiments showed an overall promotion of approximately one order of magnitude of the reaction rate of ethylene, under an oxygen atmosphere on the sweep side of the membrane reactor, as compared with the rate under an inert sweep gas. The reaction rate can keep its promoted state even after the flow of oxygen on the sweep side was interrupted. This behavior caused further promotion with every experiment cycle. The causes of permanent promotion and on demonstrating controllable promotion of the catalytic activity are presented. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

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Poulidi D, Metcalfe IS. In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane. In AIChE Annual Meeting, Conference Proceedings. 2006