Cu含量对Cu/ZSM-5催化剂氨选择性催化还原NO影响的研究  

Influence of Cu content on catalysis of Cu/ZSM-5 for the reduction of NO with ammonia

作　　者：郑昌坤 叶青[1] 程水源[1] 康天放[1] Zheng Changkun;Ye Qing;Cheng Shuiyuan;Kang Tianfang(Key Laboratory of Beijing on Regional Air Pollution Control,Beijing University of Technology,Beijing 100124)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,北京100124

出　　处：《化工新型材料》2019年第3期177-180,共4页New Chemical Materials

基　　金：国家自然科学基金项目(21277008;20777005);国家重点研发计划(2017YFC0209905);北京市自然科学基金项目(8082008)

摘　　要：采用浸渍法将铜(Cu)负载在ZSM-5分子筛上,制备了一系列不同Cu含量的Cu/ZSM-5分子筛催化剂。对ZSM-5及Cu/ZSM-5分子筛催化剂的氨选择性催化还原一氧化氮(NO)性能进行评价,并对Cu/ZSM-5分子筛催化剂进行表征分析。结果表明,Cu含量变化对Cu/ZSM-5分子筛催化剂的氨选择性催化还原反应(NH3-SCR)活性影响较大,Cu含量为0.75%(wt,质量分数)制得的Cu/ZSM-5具有最佳的中低温活性,在190℃条件下对NO的转化率为91%。Cu/ZSM-5 catalysts with different copper loadings were prepared by impregnation method.The performances of ZSM-5 and Cu/ZSM-5 catalysts in selective catalytic reduction of nitric oxide(NO)with ammonia(NH3)were investigated and the physicochemical properties of samples were characterized by XRD,XPS,BET,H2-TPR and NH3-TPD.The change of copper content was important to the activity of Cu/ZSM-5 catalysts for selective catalytic reduction with ammonia(NH3-SCR).The sample with copper content of 0.75 wt%obtained the best activity at medium and low temperatures,its conversion of NO reached 91%at 190℃.

关 键 词：铜含量 Cu/ZSM-5催化剂 氨选择性催化还原反应 氮氧化物去除 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学]