稀土掺杂铁锰脱硝催化剂的制备及其性能研究  

SELECTIVE CATALYTIC REDUCTION OF NOx WITH NH_3 OVER FE-MN-O CATALYST PROMOTED BY CeO_2

作　　者：赵海[1] 张德祥[2] 高晋生[2] 

机构地区：[1]沈阳工程学院能源与动力工程系通讯作者,辽宁110136 [2]华东理工大学能源化工系,上海200237

出　　处：《煤炭转化》2011年第4期72-74,78,共4页Coal Conversion

基　　金：中央财政支持地方高校发展专项资金资助项目(2010);长江学者和创新团队计划资助项目(IRT0620);上海市重点学科建设项目(B506)

摘　　要：实验采用共沉淀法制备铈掺杂铁锰氧化物脱硝催化剂,对催化剂进行了XRD,TPR和比表面积表征和测试,并对不同铈含量的催化剂进行脱硝性能研究.结果表明,催化剂中添加氧化铈后无规则和非晶态粒子增多,催化剂的低温还原能力有所增强.当稀土氧化物添加量在1%～10%之间时,比表面积呈现递增趋势,添加6%氧化铈的催化剂孔容最大.脱硝实验表明,铈含量增大提高了催化剂在低温区脱硝活性.在500℃以后,随温度的继续增高,催化剂的NOx脱除率开始降低.Ce promoted Fe-Mn metal oxides nanosized particles have been prepared by co-precipitation approach.The products were characterized by powder X-ray diffraction（XRD）,temperature programmed reduction（TPR） and BET study.It was found that the samller crystal size of iorn-manganese oxide can be achieved through CeO2 doping.And samples prepared with Ce pormoted show higher surface areas at calcinations temperature.At the reaction temperature range of 200 ℃-400 ℃,the Ce promoted samples exhibited much better activities for SCR.But at high temperatures,the Ce promoted catalysts showed lower activities for SCR of nitric oxide with ammonia.

关 键 词：铈掺杂 铁锰复合金属氧化物 SCR催化剂 氮氧化物 

分 类 号：TQ546[化学工程—煤化学工程]