Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NOx with NH3

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	Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NOx with NH3
	Zhu, Na ; Lian, Zhihua ; Zhang, Yan ; Shan, Wenpo ; He, Hong
刊名	CHINESE CHEMICAL LETTERS
	2019-04-01
卷号	30 期号:4 页码:867-870
关键词	Hierarchical structure Fe-Beta NH3-SCR Low-temperature activity Kinetics
ISSN号	1001-8417
英文摘要	Hierarchical Fe-Beta obtained by hydrothermal synthesis exhibited higher low-temperature NH3-SCR activity than conventional Fe-Beta. In order to identify the main factors leading to the difference in catalytic activity, we investigated the pore structure, acidity and Fe sites of the hierarchical Fe-Beta and conventional Fe-Beta. The enhanced activity of hierarchical Fe-Beta was mainly due to the increase of the quantity of active Fe species. NH3-TPD and DRIFTS results of NH3 adsorption clearly verified that hierarchical Fe-Beta had more Lewis acid sites, which is beneficial to the adsorption and activation of NH3. The H-2-TPR, UV-vis DRS, and EPR results confirmed that the hierarchical Fe-Beta had more isolated active Fe species, which may be associated with that the hierarchical structure introduced more structural defects as ion-exchange sites. Based on the analysis of kinetics experiments and the above mentioned characterizations, it can be concluded that the improvement of NH3-SCR activity was not due to an intrinsic effect of the specific structural characteristics, but was related to more Fe active sites and better dispersion of Fe species in the hierarchical Fe-Beta. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43259]
专题	生态环境研究中心_水污染控制实验室
作者单位	1.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 2.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 361021, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Ningbo Urban Environm Observat & Res Stn NUEORS, Ningbo 315800, Zhejiang, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Na,Lian, Zhihua,Zhang, Yan,et al. Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NOx with NH3[J]. CHINESE CHEMICAL LETTERS,2019,30(4):867-870.
APA	Zhu, Na,Lian, Zhihua,Zhang, Yan,Shan, Wenpo,&He, Hong.(2019).Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NOx with NH3.CHINESE CHEMICAL LETTERS,30(4),867-870.
MLA	Zhu, Na,et al."Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NOx with NH3".CHINESE CHEMICAL LETTERS 30.4(2019):867-870.