Effect of Ce0.67Zr0.33O2 on catalytic properties of Fe2O3/Al2O3 catalyst for methane combustion

In order to find a kind of low-cost and high-capability catalyst for methane combustion, a series of CeO2-ZrO2-AI(2)O(3) solid solution, in which the content of Ce(0.67)Zro(0.33)O(2) 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 T or aging in water gas at 1 000 T. 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(AI(2)O(3)) was 1: 2, the Fe2O3/Ceo(2)-ZrO2-AI(2)O(3) catalyst possessed the best catalytic capability and the best resistance to aging at high temperature.