Transient studies on the role of oxygen activation in the partial oxidation of methane over ZrO2-based catalysts

J. J. Zhu, J. G. Van Ommen, L. Lefferts*

*Corresponding author for this work

Research output: Contribution to journalMeeting AbstractOther research output

Abstract

CPOM over ZrO2-based oxide catalysts was studied by transient experiments. The oxidation products, i.e., CO, CO2, H2O, and H2, did not contain any 18O, after pulsing a mixture of CH4 and 18O2 (2:1) over YSZ catalysts at 500°-900°C. Thus, CH4 was oxidized by lattice oxygen of the catalysts. The consumed oxygen was restored by gas phase oxygen via oxygen exchange with the oxide. Interaction between gas phase oxygen and intrinsic oxygen vacancies in ZrO2 and oxygen vacancies generated by doping Y2O3 in ZrO2 was discussed. Catalytic performance was very sensitive to segregation of extremely low-level contaminations like earth alkali oxides. The effect of traces of contaminations on the catalytic performance was also elucidated. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).

Original languageEnglish
Pages (from-to)COLL-60
JournalAbstracts of papers of the American Chemical Society
Volume228
Issue number1
Publication statusPublished - 2004
Event228th American Chemical Society National Meeting (ACS): 228th ACS National Meeting - Philadelphia, U.S.A.
Duration: 25 Aug 200427 Aug 2004

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