基于Mn-CeO_x/ACFN的低温SCR脱硝  

Research on de-NO by low-temperature SCR based on Mn-CeO_x/ACFN

作　　者：沈伯雄[1] 史展亮[1] 施建伟[1] 杨婷婷[1] 赵宁[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《化工进展》2008年第1期87-91,共5页Chemical Industry and Engineering Progress

基　　金：天津自然基金项目(06YFJMJC06200);国家自然基金项目(90610018);南开大学本科百项项目(ZB0001)

摘　　要：活性碳纤维(ACF)先经硝酸处理形成ACFN,采用等体积浸渍法制备了Mn-CeOx/ACFN复合催化剂,测试了其在以氨气为还原剂的低温SCR过程中的催化活性,同时研究了金属氧化物负载量、煅烧温度、NH3初始浓度、NO初始浓度、O2含量等因素对NO脱除效率的影响。研究发现,经400℃煅烧、锰摩尔分数为40%的Mn-CeOx/ACFN复合催化剂在80～150℃低温范围具有很高的催化活性,并且在NH3/NO为1.08、NO初始体积分数650×10-6、O2体积分数在3.6%时具有较高的NO脱除效率。The catalyst of Mn-CeOx/ACFN was prepared by the method of impregnation on the surface of activated carbon fiber treated with nitric acid. The activity of Mn-CeOx/ACFN was tested in the presence of NH3 as reducing agent for selective catalytic reduction of NO. The influences of loading, calcination temperature, the concentrations ofNH3, NO and O2 on the de-NO efficiency were studied too. It was found that the catalyst of Mn-CeOx/ACFN with 40% the mole ratio of Mn/（Mn＋Ce） showed higher de-NO efficiency under the conditions of temperature 80- 150℃, NH3/NO 1.08, NO 650 ×10^-6and 02 3.6%.

关 键 词：低温选择性催化还原法 Mn-CeOx/ACFN NO脱除率 

分 类 号：X701.1[环境科学与工程—环境工程]