Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS
	Shi, Xiaoyan; Wang, Yingjie; Shan, Yulong; Yu, Yunbo; He, Hong
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-08
卷号	94 页码:32-39
关键词	Fe-ZSM-5 NH3-SCR SCR mechanism Intermediates In situ DRIFTS
ISSN号	1001-0742
英文摘要	The surface species formed in the reaction of NO and NO2 with pre-adsorbed NH3 over a Fe-ZSM-5 catalyst (1.27 wt.% Fe, SiO2/Al2O3 = 25) at low temperature (140 degrees C) were studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Through using a background spectrum of NH3-saturated Fe-ZSM-5, we clearly observed the formation of common intermediates resulting from the reaction of NO2 or NO + O-2 with pre-adsorbed NH3. This presents strong evidence that the oxidation of NO to form surface nitrates and nitrites is the key step for standard SCR at low temperature. In addition, the results suggest that in the SCR reaction at low temperature, the NH4+ ions absorbed on Bronsted acid sites are less active than NH3 adsorbed on Lewis acid sites related to Fe species. (C) 2020 Published by Elsevier B.V. on behalf of The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45090]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Shi, Xiaoyan,Wang, Yingjie,Shan, Yulong,et al. Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,94:32-39.
APA	Shi, Xiaoyan,Wang, Yingjie,Shan, Yulong,Yu, Yunbo,&He, Hong.(2020).Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS.JOURNAL OF ENVIRONMENTAL SCIENCES,94,32-39.
MLA	Shi, Xiaoyan,et al."Investigation of the common intermediates over Fe-ZSM-5 in NH3-SCR reaction at low temperature by in situ DRIFTS".JOURNAL OF ENVIRONMENTAL SCIENCES 94(2020):32-39.