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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
2020-08
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume94Pages:32-39
AbstractThe 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.
Department大气环境与污染控制实验室
KeywordFe-ZSM-5 NH3-SCR SCR mechanism Intermediates In situ DRIFTS
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45090
Collection大气环境与污染控制实验室
Recommended Citation
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.
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