稀土Cu/HZSM-5催化剂NH_3选择性催化还原法低温脱硝性能  

Performance of rare earth-Cu/HZSM-5 catalysts for selective catalytic reduction of NO by NH_3 at low temperature

作　　者：蔡卡莎 张相俊[1] 李岩[1] 王虹[1] 李翠清[1] 宋永吉[1] 

机构地区：[1]北京石油化工学院化学工程学院,北京102617

出　　处：《工业催化》2015年第12期1027-1030,共4页Industrial Catalysis

基　　金：国家自然科学基金(21343009)资助项目;重质油国家重点实验室开放基金(SKLHOP201501)资助项目

摘　　要：采用浸渍法制备Re（X）Cu／HZSM-5（Re=La，Ce，Pr，Nd；x=0．5，1，2）系列催化剂。采用XRD和H2-TPR等对催化剂进行表征，在微型固定床反应器中评价催化剂低温NH，选择还原NO的催化活性。结果表明，Re（x）Cu／HZSM-5（Re=La，Ce，Pr，Nd；x=0．5，1，2）催化剂具有较好的低温NH3选择还原NO催化活性，以La为助剂和添加质量分数1％的La（1）Cu／HZSM-5催化剂低温脱硝活性较好，T85，和T95分别为153℃和164cC，活性温度窗口宽，（153～362）℃时，NO转化率超过95％。A series of Re （x） Cu/HZSM-5 （ Re = La, Ce, Pr, Nd ;x = 0.5,1,2） catalysts was prepared by impregnation method. The catalysts were characterized by XRD and H2-TPR. The performance of the catalysts for selective catalytic reduction of NO by NH3 were tested in the fixed-bed micro-reactor. The results showed that Re （x） Cu/HZSM - 5 （ Re = La, Ce, Pr, Nd; x = 0.5,1,2 ） catalysts possessed better activity for selective catalytic reduction of NO by NH3 at low temperature, and La（ 1 ）Cu/ZSM-5 catalyst with La mass fraction 1% had better catalytic activity for NH3-SCR at low temperature; T85 和 T95 were 153 ℃ and 164 ℃ ,respectively,and NO conversion exceeded 95% in the temperature range of （153 -362） ℃.

关 键 词：催化化学 稀土Cu/HZSM-5催化剂 NH3选择性催化还原法 低温脱硝 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]