Effect of Metal Oxide Doping into Ce0.5Zr0.5O2 on Catalytic Activity of MnOx/γ-Al2O3/Ce0.45Zr0.45M0.1Ox (M = Y, La, Mn) Honeycomb Catalysts

Abstract This article showed that the catalytic activity of MnO x /γ-Al 2 O 3 /Ce 0.5 Zr 0.5 O 2 monolithic catalyst toward the catalytic combustion of ethanol in a fixed bed reactor could be greatly improved by doping three metal oxides into Ce 0.5 Zr 0.5 O 2 . The catalytic activity of MnO x /γ-Al 2 O 3 /Ce 0.45 Zr 0.45 M 0.1 O x (M = Y, La, Mn) is better than that of Mn O x /γ-Al 2 O 2 /Ce 0.5 Zr 0.5 O 2 . The order of activity of the catalysts is as follows: MnO x /γ-Al 2 O 3 /Ce 0.45 Zr 0.45 Y 0.1 O x > MnO x /γ-Al 2 O 3 /Ce 0.45 Zr 0.45 La 0.1 O x > MnO x /γ-Al 2 O 3 /Ce 0.45 Zr 0.45 Mn 0.1 O x > MnO x /γ-Al 2 O 3 /Ce 0.5 Zr 0.5 O 2 . The influence of the loading amount of manganese oxide in enhancing the catalytic activity of MnO x /γ-Al 2 O 3 /Ce 0.45 Y 0.1 O x was investigated. The results showed that when MnO 2 loading amount was 10% (mass fraction), the MnO x /Al 2 O 3 /Ce 0.45 Zr 0.45 Y 0.1 O x catalyst recorded the highest activity.