Study on catalytic combustion of benzene over cerium based catalyst supported on cordierite  

作　　者：黄琼 严小康 李兵 陈英文 祝社民 沈树宝 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing University of Technology [2]College of Life Science and Pharmaceutical Engineering,Nanjing University of Technology [3]College of Materials Science and Engineering,Nanjing University of Technology

出　　处：《Journal of Rare Earths》2013年第2期124-129,共6页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(51172107,21106072);National Key Technology R&D Program of China(2012BAE01B03);R&D Project for Environmental Protection of Jiangsu(2011023);project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

摘　　要：A series of MnCeOx catalysts supported on cordierite honeycomb （Cord） were prepared by a combustion synthesis method using Mn（NO3）2 , Ce（NO3 ）2·6H2O and citric acid. The effect of the molar ratio of Mn/Ce, calcination time, the amount of citric acid and the effect of water vapor on the catalytic properties for the complete oxidation of benzene were investigated. These catalysts were characterized by X-ray diffraction （XRD）, H 2 temperature-programmed reduction （H2 -TPR）, O2 temperature programmed desorption （O2 -TPD） and scanning electron microscopy （SEM） techniques. The results indicated that the MnCeOx /Cord catalyst with Mn/Ce molar ratio of 1：1, calcining for 7h and M n＋ /（citric acid） molar ratio of 6 exhibited the highest catalytic activity. When the concentration of benzene was 1500 ppm and the gaseous hourly space velocity was 20000h -1 , the conversion of toluene was 99.1% at the reaction temperature of 300 oC.A series of MnCeOx catalysts supported on cordierite honeycomb （Cord） were prepared by a combustion synthesis method using Mn（NO3）2 , Ce（NO3 ）2·6H2O and citric acid. The effect of the molar ratio of Mn/Ce, calcination time, the amount of citric acid and the effect of water vapor on the catalytic properties for the complete oxidation of benzene were investigated. These catalysts were characterized by X-ray diffraction （XRD）, H 2 temperature-programmed reduction （H2 -TPR）, O2 temperature programmed desorption （O2 -TPD） and scanning electron microscopy （SEM） techniques. The results indicated that the MnCeOx /Cord catalyst with Mn/Ce molar ratio of 1：1, calcining for 7h and M n＋ /（citric acid） molar ratio of 6 exhibited the highest catalytic activity. When the concentration of benzene was 1500 ppm and the gaseous hourly space velocity was 20000h -1 , the conversion of toluene was 99.1% at the reaction temperature of 300 oC.

关 键 词：MnCeO x /cordierite CATALYSTS catalytic combustion BENZENE rare earths 

分 类 号：O643.32[理学—物理化学]