Oscillations in Partial Oxidation of Methane to Syngas over Supported Mixed Oxides Promoted with Pt
A. V. Simakov, S. N. Pavlova, N. N. Sazonova, V. A. Sadykov, O. I. Snegurenko, V. A. Rogov, V. N. Parmon, I. A. Zolotarskii, V. A. Kuzmin and E. M. Moroz
G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences,
Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia), E-mail: pavlova@catalysis.nsk.su
Abstract
Ni, Pt, lanthanum nickelate with and without Pt supported on corundum carrier either pure or promoted with CeO2–ZrO2 were tested in partial methane oxidation (POM) to synthesis gas under conditions (high temperature, short contact time, highly diluted gas mixture, small catalyst grains) providing studying of the intrinsic kinetics. The phase composition and reducibility of catalysts were characterized with XRD and TPR technique. The influence of catalyst composition on the catalyst performance has been studied. The self-sustained oscillations of methane conversion and products concentration have been observed. The nature of those oscillations is discussed taking into account the intrinsic properties of the catalysts clarified with TPR and XRD.
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