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MnO_x/Al_2O_3 and MnO_x/ZrO_2-Al_2O_3 catalysts were prepared by incipient wetness impreg-nation of Mn(CH_3COO)_2 on the corresponding supports, followed by the characterization using X-raydiffraction (XRD), temperature programmed reduction (TPR) and BET surface area techniques. Theresult shows the BET surface area of ZrO_2-Al_2O_3 is lower than that of Al_2O_3 due to the loading of ZrO_2.However the resulted MnO_x/ZrO_2-Al_2O_3 catalyst exhibits higher activity for methane combustion thanMnO_x/Al_2O_3, because the addition of ZrO_2 onto Al_2O_3 is beneficial for the dispersion of Mn species andthe improvement of the lattice oxygen activity in MnO_x, subsequently tbe activation of methane duringcombustion. The optimum loading of Zr in MnO_x/ZrO_2-Al_2O_3 is in the range of 5%-10% correlated withthe calcination temperatures of catalyst supports.
MnO_x / Al_2O_3 and MnO_x / ZrO_2-Al_2O_3 catalysts were prepared by incipient wetness impreg-nation of Mn (CH_3COO) _2 on the corresponding supports, followed by the characterization using X-raydiffraction (XRD), temperature programmed reduction (TPR) and BET surface area techniques. Theresult shows that BET surface area of ZrO_2-Al_2O_3 is lower than that of Al_2O_3 due to the loading of ZrO_2.However the resulting MnO_x / ZrO_2-Al_2O_3 catalyst exhibits higher activity for methane combustion than MnO_x / Al_2O_3, because the addition of ZrO_2 onto Al 2 O 3 is beneficial for the dispersion of Mn species and the improvement of the lattice oxygen activity in MnO x, subsequent tbe activation of methane during combustion. The level loading of Zr in MnO x / ZrO 2 -Al 2 O 3 is in the range of 5% -10% correlated withthe calcination temperatures of catalyst support.