Low-temperature catalytic combustion of trichloroethylene over MnO -CeO2 mixed oxide catalysts

Abstract

The cerium-based catalysts were investigated for the catalytic combustion of trichloroethylene (TCE) and exhibit a surprising catalytic activity. MnOx was doped into CeO2 by a citric acid (CA) sol-gel method, and the effect of Mn content on the physicochemical properties and catalytic activities of MnOx-CeO2 mixed oxides was investigated systemically. The introduction of MnOx into CeO2 can evidently improve the catalytic activity and reaction stability of the CeO2 catalyst, and the catalytic activity can be maintained for more than 100 h at 250 °C under air atmosphere. Moreover, a possible reaction mechanism and a catalytic cycle for the catalytic combustion of TCE over the MnOx-CeO2 mixed oxide catalysts are proposed.