Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
Feature: The 55th Symposium on Basic Science of Ceramics: Notes
Catalytic methane combustion over novel catalyst based on oxide-ion-conducting lanthanum silicate
Naoyoshi NUNOTANINaoki MORIYAMAKenji MATSUONobuhito IMANAKA
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Volume 125 (2017) Issue 10 Pages 773-775

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Abstract

A novel PdO/La10Si6O27/γ-Al2O3 catalyst was developed in order to decompose methane. In this catalyst, we selected the oxide-ion-conducting La10Si6O27 solid with an apatite-type structure as a promoter to facilitate the supply of active oxygen to the PdO activator. For the comparison with PdO/La2O3/γ-Al2O3, where La2O3 is a simple rare earth sesquioxide, the catalytic activity of PdO/La10Si6O27/γ-Al2O3 was higher than that of PdO/La2O3/γ-Al2O3, regardless of their same surface area. Since La10Si6O27 exhibited two orders of magnitude higher conductivity than La2O3, the high oxide-ion-conducting property of La10Si6O27 might facilitate the oxidation of methane by supplying active oxygen from inside the lattice.

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© 2017 The Ceramic Society of Japan
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