The effect of TiO2 doping on catalytic performances of Ru/CeO2 catalysts during catalytic combustion of chlorobenzene

The lower temperature catalytic combustion of chlorinated hydrocarbons (CHCs), including chlorobenzene (CB), 1,2-dichloroethane (DCE) and trichloroethylene (TCE), over RuO2 supported on Ti-doped CeO2 catalysts (Ru/Ti-CeO2) was investigated, and the effects of preparation methods, Ti content, Ru content, inlet CB concentration and space velocity, oxygen concentration and water were studied detailedly. Moreover, the doping of other different metals (Mn, Co, Sn and Mg) and the supporting of different precious metals (Pt, Pd, Rh, Au and Ag) also were briefly explored. The results show that the doping of Ti can improve obviously the catalytic activity and stability of CeO2 based catalysts. The better catalytic activity of Ru/Ti-CeO2 is ascribed to the expose of more oxygen vacancies and high energy lattice plane CeO2 (1 1 0) and (1 0 0), and the Cl dissociatively adsorbed at active sites of CeO2 can be oxidized into Cl-2 catalyzed by RuO2 supported Ti-CeO2 at lower temperature (such as 200 degrees C) which be responsible to the excellent stability of Ru/Ti-CeO2 catalysts. (c) 2013 Elsevier B.V. All rights reserved.