Low-temperature catalytic combustion of chlorobenzene over MnO_x-CeO2 mixed oxide catalysts

摘要

MnO_x-CeO2 mixed oxide catalysts prepared by sol-gel method were tested for the catalytic combustion of chlorobenzene (CB), as a model of chlorinated aromatic volatile organic compounds (CVOCs). MnO_x-CeO2 catalysts with the different ratio of Mn/Ce + Mn were found to possess high catalytic activity for catalytic combustion of CB, and MnO_x(0.86)-CeO2 was the most active catalyst, on which the complete combustion temperature (T_(90%)) of chlorobenzene was 236 °C. The stability of MnO_x-CeO2 catalysts in the CB combustion was investigated. MnO_x-CeO2 catalysts with high Mn/Ce + Mn ratios present high stable activity, which is related to their high ability to remove Cl species adsorbed and a large amount of active surface oxygen.