Fe对改性ACF负载锰铈复合氧化物低温NH_3选择性催化还原NO的影响  

Effect of Fe on the Selective Catalytic Reduction of NO by NH_3 at Low Temperature over Manganese-cerium Composite Oxide Supported on Modified ACF

作　　者：曹伟[1] 刁永发[1] 洪俊[1] 曹杰[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《工业安全与环保》2015年第10期81-83,99,共4页Industrial Safety and Environmental Protection

基　　金：国家"863"高技术研究发展计划项目(2008AA05Z305);上海市优秀技术带头人计划项目(14XD1424700)

摘　　要：活性炭纤维（ACF）先经过硝酸处理形成ACFN,以锰氧化物为活性成分,Ce O2/ACFN为载体,采用浸渍法制备一系列不同物质的量比的Mn-Ce/ACFN催化剂。研究不同含量Fe的加入对Mn-Ce/ACFN的低温还原NO活性的影响。同时对比研究了Ce/ACFN、Mn-Ce/ACFN、Fe-Mn-Ce/ACFN净化NO的能力。利用热重分析（TG）实验、扫描电镜（SEM）和催化剂活性实验探讨了金属离子的分布、煅烧温度和不同载体对催化剂活性的影响。结果表明,Fe的引入使得Mn-Ce/ACFN的NH3-SCR活性显著提高,催化剂在140~280℃之间表现出良好的脱除NO的效果,最高的NO脱除效率达到91.3%。Activated carbon fibers is pre- treated by nitric acid（ ACFN）. The Mn- Ce / ACFN catalyst with a series of different amount of substance ratio is prepared by the method of impregnation using manganese oxide as active ingredient and Ce O2/ ACFN as supporter. The dose- response relationship of Fe and the activity of Mn- Ce / ACFN to reduce NO at low temperature is analyzed. Meanwhile,a comparative study of the purification capacity of Ce / ACFN,Mn- Ce / ACFN and Fe- Mn- Ce / ACFN to NO is conducted. The effects of distribution of metal ions,calcination temperature and different supporter on the catalyst activity are discussed under thermogravimetric analysis（ TG） experiment,scanning electron microscope（ SEM） and catalyst activity experiment. The results indicate that the activity of Mn- Ce / ACFN NH3- SCR is increased significantly with the introduction of Fe,catalyst shows good efficiency of converting NO between 140 ~ 280 ℃ and the highest conversion rate can reach 91. 3%.

关 键 词：FE 选择性氧化还原 Mn 活性炭纤维 

分 类 号：X701[环境科学与工程—环境工程]