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

• Published in: Journal of rare earths 2013-02, Vol.31 (2), p.124-129
• Main Author: 黄琼 严小康 李兵 陈英文 祝社民 沈树宝
• Format: Article
• Language: English
• Subjects: Benzene; Catalysis; Catalysts; catalytic combustion; Citric acid; Combustion synthesis; Cordierite; Manganese; MnCeOx/cordierite; O2-TPD; Rare earth metals; rare earths; 催化剂制备; 堇青石; 扫描电子显微镜; 烧研; 甲苯; 程序升温还原; 铈基
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(12)60245-2

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.