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

doi:10.1016/j.cattod.2024.114545

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Support effect and reaction pathway for NO direct decomposition over CuMn/A (A=ZSM-5, Beta, SSZ-13) catalysts
	Kang, Running 4,5,6; An, Sufeng 3; Wang, Xuehai 3; Wang, Gang 3; Chen, Hong 2; Zhang, Cuijuan 1; Bin, Feng 4,5; Li, Yongdan 6
刊名	CATALYSIS TODAY
	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
DOI	10.1016/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.
资助项目	International Science and Technology Cooperation Projects (Sinopec)[410920] ; China Scholarship Council (CSC)[202004910623]
WOS关键词	NITRIC-OXIDE ; ZEOLITES ; TEMPERATURE ; REDUCTION ; CU-ZSM-5 ; REMOVAL ; MECHANISM ; PROMOTION ; DISTANCE ; OXYGEN
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)
内容类型	期刊论文
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.,...&Li, Yongdan.(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.