Abstract: In order to find a kind of low-cost and high-capability catalyst for methane combustion, a series of CeO₂-ZrO₂-Al₂O₃ solid solution, in which the content of Ce₀.67Zr₀.33O₂ and Al₂O₃ were different, were prepared by co-precipitation method. Fe₂O₃-based catalysts supported on the solids were prepared by impregnation. Their characterizations and catalytic activity were tested by BET, TPR, XRD methods after being calcined at 600 ℃ or aging in water gas at 1 000 ℃. It is indicated that addition of Stoichiometric Ce₀.67Zr₀.33O₂ into the Al₂O₃ support improved the catalytic capability of the Fe₂O₃/CeO₂-ZrO₂-Al₂O₃ catalyst, increased the catalyst's specific surface areas, promoted its redox ability, and stabilized its crystal structure. In particular, when m(Ce₀.67Zr₀.33O₂)∶m(Al₂O₃) was 1∶2, the Fe₂O₃/CeO₂-ZrO₂-Al₂O₃ catalyst possessed the best catalytic capability and the best resistance to aging at high temperature.

Key words: CeO₂-ZrO₂-Al₂O₃, Fe₂O₃-based monolith catalyst, Catalytic combustion of methane, Catalytic properties, Resistance to aging at high temperature