In situ catalyst activity control in a novel membrane reactor-Reaction driven wireless electrochemical promotion of catalysis

D. Poulidi*, I. S. Metcalfe

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)446-450
Number of pages5
JournalChemical Engineering Science
Volume65
Issue number1
DOIs
Publication statusPublished - 2010

Keywords

  • Catalyst activation and deactivation
  • Membrane reactors
  • Metal support interactions
  • Oxygen spillover
  • Wireless electrochemical promotion of catalysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering

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