Mn-Cu-Ce-Fe/REY系列催化剂上NH_3选择性催化还原NO性能

Selective catalytic reduction of NO with NH_3 over Mn-Cu-Ce-Fe/REY catalysts

采用正交实验设计和浸渍法制备Mn-Cu-Fe-Ce/REY催化剂。采用固定床微型反应器评价SO2存在下催化剂在NH3选择性催化还原NO反应中的活性,考察Mn、Cu、Fe和Ce各活性组分对催化剂活性的影响,并采用XRD、H2-TPR和SEM等手段对催化剂进行表征。结果表明,Mn、Cu、Fe和Ce各活性组分对催化剂活性影响顺序为:Cu>Fe>Ce>Mn,催化剂的氧化还原性能影响催化剂活性。

Mn-Cu-Fe-Ce/REY catalysts were designed with orthogonal experimental method and prepared by impregnation method. The catalytic performance of the catalysts for selective reduction of NO with NH3 was evaluated in the presence of SO2 and in a fixed bed micro-reactor. The effects of Mn, Cu, Fe and Ce components on the catalytic activity were investigated. The catalysts were characterized by XRD, SEM and H2-TPR. The results showed that the sequence of the influence of active components on catalyst activity from big to small was as follows ： Cu 〉 Fe 〉 Ce 〉 Mn, and the activity of the catalysts was affected by their redox properties.