微波制备V-Mn/TiO_2脱硝催化剂及性能研究  

Activity of V-Mn/TiO_2 Catalyst Prepared by Microwave Radiation

作　　者：邹鹏[1] 熊志波[1] 周飞[1] 韩奎华[1] 路春美[1] 

机构地区：[1]山东大学燃煤污染物减排国家工程实验室,山东济南250061

出　　处：《锅炉技术》2014年第2期72-76,共5页Boiler Technology

摘　　要：利用浸渍法制备了二氧化钛负载型锰钒复合氧化物SCR脱硝催化剂,探讨微波干燥技术对其SCR脱硝性能的影响规律、探讨最佳微波干燥参数并揭示钒锰负载量的影响规律。结果表明:与传统干燥相比,微波干燥能够大幅度提高复合催化剂的低温SCR脱硝活性,活性温度250℃时,传统干燥所制备的催化剂其脱硝效率为51.9%,微波干燥使其脱硝效率提高了31.7个百分点,达83.6%。并借助XRD、SEM和BET对复合催化剂的晶相、微观结构及比表面积进行了表征,与常规干燥相比,微波干燥能够提高活性组分在载体上的分散度,改善催化剂的孔隙率结构。微波干燥的最佳参数为:微波功率210 W;微波时间20 min;锰钒的最佳负载量分别为3%和5%。SCR catalysts of vanadium and manganese oxides supported on TiO2 were prepared by impregnation method. The effects on catalytic activity of microwave radiation, microwave operation parameters and the loading of vanadium and manganese were studied. Experimental results showed that microwave radiation could improve catalysts ~ SCR activity. NO conversion of the microwave dying catalysts reaches 83.6% and the common dying catalysts~ is 51.9% at 250 ~C. With the aid of such characteristics as XRD. SEM and BET, the crystalline phase.microstructure and surface area of the catalysts were studied. Microwave dying could improve the pore structure and degree of dispersion of active constituent on the supporter. The best microwave parameters were that power was 210 W and time was 20 mini the best loading of vanadium and manganese was 3 % and 5 %.

关 键 词：V-Mn TIO2 选择性催化还原 烟气脱硝 催化剂 微波 

分 类 号：O643.361[理学—物理化学]