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φ（NO）=500×10^-6，n（NH3）：n（NO）=1：1和φ（O2）=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／Al2O3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%.
参考文献
| [1] | 吴碧君,刘晓勤,肖萍,王述刚.Mn-Fe/TiO2低温NH3选择性还原NO催化活性及其反应机制[J].中国电机工程学报,2007(17):51-56. |
| [2] | 沈伯雄,史展亮,施建伟,杨婷婷,赵宁.基于Mn-CeOx/ACFN的低温SCR脱硝[J].化工进展,2008(01):87-91. |
| [3] | Qi GS.;Yang RT. .Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2003(3):217-225. |
| [4] | Min Kang;Eun Duck Park;Ji Man Kim;Jae Eui Yie .Cu-Mn mixed oxides for low temperature NO reduction with NH_3[J].Catalysis Today,2006(3/4):236-241. |
| [5] | Huang JH;Tong ZQ;Huang Y;Zhang JF .Selective catalytic reduction of NO with NH3 at low temperatures over iron and manganese oxides supported on mesoporous silica[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):309-314. |
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