不同金属在催化脱硝过程中作用研究  

Effect of Different Metals for Low Temperature Selective Catalytic Reduction of NO

作　　者：王晓波[1] 王芳[1] 姚桂焕[1] 归柯庭[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《工程热物理学报》2011年第8期1331-1333,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50576013)

摘　　要：采用共浸渍法和分步浸渍法在氧化铝载体上通过调节金属元素的负载量和负载顺序制备了多种催化剂,测试了其在NH3作为还原剂条件下的低温催化脱硝活性,研究各种活性组分在脱硝过程中的作用,考察浸渍顺序对脱硝性能的影响。在(?)(NO)=500×10^(-6),n(NH_3):n(NO)=1:1和(?)(O_2)=3.6%的条件下进行试验,结果表明,Mn在脱硝反应中是主要的活性组分,而Fe和Zr是助催化组分;浸渍顺序对催化剂脱硝活性有一定影响;当Fe负载量达到10%时,制备的催化剂5Zr-5Mn-10Fe/Al_2O_3脱硝活性最佳。Various catalysts were prepared on the alumina carrier by adjusting the loadings and the load sequence of metals with co-impregnation and step impregnation method. The catalytic activity of these catalysts for denitration with NH3 as reducing agent at low temperature was tested. In addition, the effect of various active components in denitration process and the influence of impregnation sequence on denitration performance were investigated in this paper. The experiments were carried on with the condition of φ（NO）=500×10^-6, n（NH3）：n（NO）=1：1 andφ（O2）=3.6%. The results show that the main active component in denitration reaction is Mn. Fe and Zr performed as catalytic promoter. And the impregnation sequence has some influence on the catalytic activity for denitration. The best denitration activity of 5Zr-5Mn-10Fe/Al2O3 would appear while the loading of Fe being 10%.

关 键 词：浸渍法 脱硝 催化剂 脱除率 

分 类 号：X511[环境科学与工程—环境工程]