纳米TiO_2-Al_2O_3负载CuMnO_x对甲苯的催化燃烧  

Catalytic Combustion of Toluene over CuMnO_x Catalysts Supported on TiO_2-Al_2O_3

作　　者：曹利[1] 凌海志[1] 黄学敏[1] 马广大[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《环境科学与技术》2010年第6期28-30,74,共4页Environmental Science & Technology

基　　金：教育部高等学校博士学科点专项科研基金(200807030007)

摘　　要：研究采用改进的溶胶-凝胶法制备了TiO2-Al2O3复合载体,并用浸渍法制备CuMnOX/TiO2-Al2O3催化剂,通过对甲苯废气催化燃烧的实验,分别考察了Cu-Mn负载量、Cu/Mn摩尔比、焙烧温度及载体对催化剂制备过程及催化剂活性的影响。实验结果表明:活性组分负载量25%,铜锰活性组分的配比Cu:Mn=1:2,焙烧温度500℃是浸渍法制备CuMnOX/TiO2-Al2O3催化剂较佳的工艺条件;XRD衍射图谱表明,500℃下铜锰尖晶石的存在是催化剂催化活性优良的主要原因;由复合载体制备的CuMnOX/TiO2-Al2O3催化剂比单一载体制备的CuMnOX/Al2O3催化剂具有更高的甲苯转化率,其T99比单一载体要低20℃以上。TiO2-Al2O3 complex supports were prepared by a modified sol-gel method,and Cu-Mn composite oxides supported on TiO2-Al2O3 catalysts were prepared by solution impregnation. The catalytic activity of CuMnOX/TiO2-Al2O3 for toluene combustion was studied, and the effects of the loading of Cu-Mn composite oxides, the molar ratio of Cu: Mn, calcination temperature and carrier on catalytic combustion of toluene were studied in detail. Results show that 25% load of Cu-Mn, Cu: Mn of 1: 2, and roasting temperature 50...

关 键 词：甲苯 复合载体 Cu-Mn复合氧化物 催化燃烧 

分 类 号：X51[环境科学与工程—环境工程]