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Design of High-Performance Iron-Niobium Composite Oxide Catalysts for NH3-SCR: Insights into the Interaction between Fe and Nb
Zhang, Wenshuo; Shi, Xiaoyan; Yan, Zidi; Shan, Yulong; Zhu, Ying; Yu, Yunbo; He, Hong
2021-08-06
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume11Issue:15Pages:9825-9836
AbstractA series of iron-niobium composite oxides for selective catalytic reduction of NOx with NH3 (NH3-SCR) were prepared by coprecipitation with the assistance of CTAB. The obtained FeNb0.4Ox-C catalyst exhibited superior SCR performance, with NOx conversion above 90% at 250-400 degrees C under a high GHSV of 250 000 h(-1). Characterization of the oxides by N-2-physisorption, XRD, Raman, TG/DTA, NH3-TPD, H-2-TPR, and XPS showed that when CTAB was present during preparation, a strong interaction between Fe and Nb was produced for the Fe-Nb catalysts made with an appropriate proportion of the two elements, which promoted the formation of gamma-Fe2O3. The strong Fe-Nb interaction not only induced more reducible Fe at low temperatures but also enhanced the surface acidity, both of which brought about more active sites on the FeNb0.4Ox-C catalyst. Owing to such strong interaction between redox-acid sites, more NOx species were adsorbed and activated over FeNb0.4Ox-C, thus exhibiting high reactivity during the NH3-SCR reaction, which was revealed by DRIFT and kinetic studies.
Department水污染控制实验室
KeywordNH3-SCR selective catalytic reduction iron oxides NOx abatement structure-activity relationship
WOS Research AreaChemistry, Physical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46033
Collection水污染控制实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Wenshuo,Shi, Xiaoyan,Yan, Zidi,et al. Design of High-Performance Iron-Niobium Composite Oxide Catalysts for NH3-SCR: Insights into the Interaction between Fe and Nb[J]. ACS CATALYSIS,2021,11(15):9825-9836.
APA Zhang, Wenshuo.,Shi, Xiaoyan.,Yan, Zidi.,Shan, Yulong.,Zhu, Ying.,...&He, Hong.(2021).Design of High-Performance Iron-Niobium Composite Oxide Catalysts for NH3-SCR: Insights into the Interaction between Fe and Nb.ACS CATALYSIS,11(15),9825-9836.
MLA Zhang, Wenshuo,et al."Design of High-Performance Iron-Niobium Composite Oxide Catalysts for NH3-SCR: Insights into the Interaction between Fe and Nb".ACS CATALYSIS 11.15(2021):9825-9836.
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