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Methane activation by surface oxygen in calcia-stabilized zirconia

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Abstract

Methane activation at 450–700°C by 14 mol% calcia-stabilized zirconia was studied by the transient reaction of pure methane with the oxidized material. Three distinct sequential reaction regimes are observed. Initially, methane oxidation rates are similar to those in cofed methane–oxygen mixtures. After a small amount of oxygen (amount) is removed from the material, the reactivity of the material suddenly increases while a larger amount of oxygen, roughly equivalent to 1 surface layer, is removed. Finally, after this reductive phase, methane continues to react rapidly to deposit a surface layer of carbonaceous material which can be removed by reoxidation. This cycle can be repeated.

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Authors and Affiliations

  1. Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada, M5S 3E5

    C.A. Mims

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  1. C.A. Mims
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Mims, C. Methane activation by surface oxygen in calcia-stabilized zirconia. Catalysis Letters 68, 203–208 (2000). https://doi.org/10.1023/A:1019060209697

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