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Support effect and reaction pathway for NO direct decomposition over CuMn/A (A=ZSM-5, Beta, SSZ-13) catalysts

文献类型：期刊论文

作者Kang, Running4,5,6; An, Sufeng3; Wang, Xuehai3; Wang, Gang3; Chen, Hong2; Zhang, Cuijuan1; Bin, Feng4,5; Li, Yongdan6; Bin F(宾峰); Kang RN(康润宁)
刊名CATALYSIS TODAY
出版日期2024-03-15
卷号430页码:9
关键词NO direct decomposition CuMnOx Zeolites Support effect Reaction pathway
ISSN号0920-5861
DOI10.1016/j.cattod.2024.114545
通讯作者Li, Yongdan(yongdan.li@aalto.fi)
英文摘要The CuMn/ZSM-5 (CM/Z), CuMn/Beta (CM/B), and CuMn/SSZ-13 (CM/S) catalyst samples were prepared via an excess impregnation method to investigate the metal-support effect. The results show that the activity at 550 degrees C for NO direct decomposition follows the order of CM/Z (53.4%) > CM/B (49.2%) > CM/S (7.9%). The good activity and stability of CM/Z are attributed to a strong support effect including forming more active copper sites of the (Cu2+-O2--Cu2+)(2+) and (Cu+-square -Cu+)(2+) dimers, which have higher redox activity, capacity of oxygen mobility, and NO sorption capability. The competitive adsorption between NO and O-2 on the oxygen vacancy of dimers over CM/Z results in the activity decrease from 53.4% to 40.3% at 550 degrees C after adding 1 vol% O-2. The reaction mechanism over CM/Z was discussed based on the in situ DRIFT and isotopic (O-18(2)) experiments. Two NO adsorbs firstly on (Cu+-square -Cu+)(2+) to form N2O, and N2O is activated to produce N-2, followed by the NO adsorption on (Cu2+-O2--Cu2+)(2+) to form nitrite and nitrate species and decomposition to NO and O-2.
WOS关键词NITRIC-OXIDE ; ZEOLITES ; TEMPERATURE ; REDUCTION ; CU-ZSM-5 ; REMOVAL ; MECHANISM ; PROMOTION ; DISTANCE ; OXYGEN
资助项目International Science and Technology Cooperation Projects (Sinopec)[410920] ; China Scholarship Council (CSC)[202004910623]
WOS研究方向Chemistry ; Engineering
语种英语
WOS记录号WOS:001175084100001
资助机构International Science and Technology Cooperation Projects (Sinopec) ; China Scholarship Council (CSC)
源URL[http://dspace.imech.ac.cn/handle/311007/94963]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Li, Yongdan
作者单位1.Tianjin Univ, Tianjin Key Lab Appl Catalysis Sci & Technol, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn & Technol,State Key Lab Chem Engn, Tianjin 300072, Peoples R China
2.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
3.Dalian Res Inst Petr & Petrochem, SINOPEC, Dalian 116045, Peoples R China
4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China
6.Aalto Univ, Sch Chem Engn, Dept Chem & Met Engn, Kemistintie 1,POB 16100, FI-00076 Espoo, Finland
推荐引用方式
GB/T 7714		 Kang, Running,An, Sufeng,Wang, Xuehai,et al. Support effect and reaction pathway for NO direct decomposition over CuMn/A (A=ZSM-5, Beta, SSZ-13) catalysts[J]. CATALYSIS TODAY,2024,430:9.
APA Kang, Running.,An, Sufeng.,Wang, Xuehai.,Wang, Gang.,Chen, Hong.,...&康润宁.(2024).Support effect and reaction pathway for NO direct decomposition over CuMn/A (A=ZSM-5, Beta, SSZ-13) catalysts.CATALYSIS TODAY,430,9.
MLA Kang, Running,et al."Support effect and reaction pathway for NO direct decomposition over CuMn/A (A=ZSM-5, Beta, SSZ-13) catalysts".CATALYSIS TODAY 430(2024):9.

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来源：力学研究所

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