Catalytic combustion of toluene over platinum supported on Ce-Zr-O solid solution modified by Y and Mn

A series of CeO2-ZrO2 mixed oxides were prepared using coprecipitation method and characterized by BET, oxygen storage capacity (OSC), X-ray diffraction (XRD) and H2-temperature-programmed reduction (H2-TPR). The catalytic activities toward toluene combustion were investigated in a micro-reactor. The results demonstrate that the catalytic activity of Pt/γ-Al2O3/Ce0.50Zr0.50O2 monolithic catalyst can be greatly improved by doping metal into Ce0.50Zr0.50O2. When doping Y and Mn into Ce0.50Zr0.50O2 simultaneously, the catalyst Pt/γ-Al2O3/Ce0.40Zr0.40Y0.10Mn0.10OX shows the highest activity. The T10 (the temperature of 10% toluene conversion) and the complete conversion temperature (the temperature of 90% toluene conversion) of toluene are 443 and 489 K, respectively. Gas hourly space velocity (GHSV) results show that the prepared catalyst can be applied in a wide range of GHSV (from 12,000 to 20,000 h−1). The catalyst prepared shows great potential for practical application.