Low temperature catalytic combustion of chlorobenzene over Mn–Ce–O/γ-Al2O3 mixed oxides catalyst

A series of MnxCey/Al2O3 mixed oxides catalysts with different compositions prepared by wet impregnation method were tested for catalytic combustion of chlorobenzene (CB), as a model of volatile organic compounds of chlorinated aromatics. MnxCey/Al2O3 mixed oxides catalysts present high activity for the low temperature catalytic destruction of CB and Mn8Ce2/Al2O3 catalyst is identified as the most active catalyst, on which the temperature of complete combustion of CB is 338 °C. Effects of systematic variation of reaction conditions, including space velocity and inlet CB and oxygen concentration on the reaction were investigated. Additionally, the stability and deactivation of MnxCey/Al2O3 mixed oxides catalysts were studied by various characterization methods and other assistant experiments. MnxCey/Al2O3 mixed oxides catalysts with high Mn/Ce ratios present a stable high activity, which is related to their better reducibility.