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Updated: Jun 13, 2026

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
Published on: February 7, 2017
Oscillatory behaviour of catalytic properties, structure and temperature during the catalytic partial oxidation of
Bertram Kimmerle1, Alfons Baiker, Jan-Dierk Grunwaldt
1Department of Chemistry and Applied Biosciences, ETH Zürich, Hönggerberg-HCI, CH-8093 Zürich, Switzerland. b.kimmerle@chem.ethz.ch
Abstract:
Pd/Al(2)O(3) catalysts showed an oscillatory behaviour during the catalytic partial oxidation (CPO) of methane, which was investigated simultaneously by IR-thermography, X-ray absorption spectroscopy, and online mass-spectrometry to correlate the temperature, state of the catalyst and catalytic performance. The following stages were observed: (i) build-up of a temperature maximum in the first half of the catalyst bed, (ii) reduction of palladium in the end zone of the catalyst bed with a front moving toward the entrance zone, (iii) strong hot spot formation accompanied by reduction of palladium due to self-reduction leading to extinction of the process. The latter was the key driver for the oscillations and thus gave additional insight into the mechanism of partial methane oxidation.
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