Low temperature catalytic combustion of o-dichlorobenzene over supported Mn–Ce oxides: effect of support and Mn/Ce ratio

Abstract

A series of Mn–Ce mixed oxide catalysts supported on cordierite, TiO₂ or γ-Al₂O₃ carriers were tested for their catalytic performance towards hazardous gaseous o-dichlorobenzene combustion. The results indicated that superficial MnO_x species vary with carriers such as Mn₂O₃ on the cordierite, Mn₃O₄ on the TiO₂ and amorphous MnO_x on the Al₂O₃ support. The catalysts supported on cordierite with a 9 : 1 Mn/Ce the ratio presented high catalytic performance in a low temperature range of 150–300 °C, which is due to their better reducibility, well-dispersed manganese oxide and enrichment of available active oxygen species on the catalysts surface.