Citation: CAO Hong-Yan, WANG Jian-Li, YAN Sheng-Hui, LIU Zhi-Min, NG Mao-Chu, CHEN Yao-Qiang. Effect of Doping M (M = Mn, Y) into Ce0.50Zr0.50O2 on the Properties of MnOx/Ce0.50-zZr0.50-zM2zOy/Al2O3 for Catalytic Combustion of Ethyl Acetate[J]. Acta Physico-Chimica Sinica, ;2012, 28(08): 1936-1942. doi: 10.3866/PKU.WHXB201205173
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The effect of doping M (M = Mn,Y) into ceria-zirconia solid solutions on the activity of MnOx/Ce0.50-zZr0.50-zM2zOy/Al2O3 for catalytic combustion of ethyl acetate has been investigated. It is found that doping of Mn increases greatly the oxygen storage capacity (OSC) of the oxygen-storage materials (OSMs); doping of Y decreases obviously the reduction temperature of catalysts; the doping of Mn and Y combines the advantages of doping of Mn and Y. MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/ Al2O3 has the best catalytic performance. The complete conversion temperature of ethyl acetate over the catalyst is 513K and the temperature range between T10% and T100% is the smallest. This catalyst can be applied to abatement of ethyl acetate under conditions of wider range of inert concentration and higher gas hourly space velocity (GHSV). Results of H2-temperature-programmed reduction(H2-TPR)and X-ray diffraction (XRD) analyses show that MnOx/Ce0.40Zr0.40Mn0.10Y0.10Oy/Al2O3 has lower reduction temperature and larger peak area. Mn and Y enter the lattice of ceria-zirconia solid solutions, which improves the textural properties and greatly promotes the MnOx dispersion on the support surface.
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