Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3

doi:10.1039/d1cy01181b

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	Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3
	Fan, Hao 1,2; Fan, Jie 1; Chang, Tian 3; Wang, Xiuru 1; Wang, Xin 4; Huang, Yu 2; Zhang, Yang 5; Shen, Zhenxing 1,2
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2021-08-23
页码	11
ISSN号	2044-4753
DOI	10.1039/d1cy01181b
通讯作者	Shen, Zhenxing(zxshen@mail.xjtu.edu.cn)
英文摘要	Exhaust gas from the sintering process in the iron and steel industry contains NOx and SO2 at low temperature. Therefore, the corresponding denitration catalyst should have favorable low-temperature activity and SO2 resistance. In this study, an Fe-doped MnO2 nanotube catalyst with the (211) crystal face synthesized using a one-step hydrothermal synthesis method demonstrated favorable pore structure and many weak acidic sites, which improved its low-temperature activity (>90% at 125-225 degrees C), N-2 selectivity (>90%), and SO2 resistance. The NO conversion rate reached 94% when the Fe0.5%MnO2 catalyst was used in the presence of SO2. Moreover, the Fe in the Fe0.5%MnO2 catalyst improved the reducibility of the surface Mn sites and reduced the oxidizing properties of bridging oxygen, resulting in easier conversion of Mn4+ to Mn3+ and affecting the regeneration of oxygen vacancies in the selective catalytic reduction of NOx with NH3 process. In situ diffuse reflectance infrared spectroscopy showed that the reduction of NOx in the MnO2 nanotubes and Fe0.5%MnO2 sample involved the Eley-Rideal mechanism, whereas the NH3-SCR process of the Fe5%MnO2 sample involved both Langmuir-Hinshelwood and Eley-Rideal mechanisms.
资助项目	State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences[SKLLQG1919]
WOS关键词	IN-SITU DRIFTS ; SULFUR RESISTANT CATALYST ; MODIFIED MNOX/TIO2 ; REACTION-MECHANISM ; MIXED OXIDES ; NH3-SCR ; SO2 ; PERFORMANCE ; ALPHA-MNO2 ; COMPOSITE
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000693982800001
资助机构	State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/16969]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Shen, Zhenxing
作者单位	1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710049, Peoples R China 3.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China 4.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA USA 5.Xi An Jiao Tong Univ, Instrumental Anal Ctr Xian Jiaotong Univ, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Fan, Hao,Fan, Jie,Chang, Tian,et al. Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3[J]. CATALYSIS SCIENCE & TECHNOLOGY,2021:11.
APA	Fan, Hao.,Fan, Jie.,Chang, Tian.,Wang, Xiuru.,Wang, Xin.,...&Shen, Zhenxing.(2021).Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3.CATALYSIS SCIENCE & TECHNOLOGY,11.
MLA	Fan, Hao,et al."Low-temperature Fe-MnO2 nanotube catalysts for the selective catalytic reduction of NOx with NH3".CATALYSIS SCIENCE & TECHNOLOGY (2021):11.