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.
出处
《煤炭转化》
CAS
CSCD
北大核心
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)
关键词
铈掺杂
铁锰复合金属氧化物
SCR催化剂
氮氧化物
cerium promoted
Fe-Mn metal oxides
selective catalytic reduction catalyst
nitrogen oxides
