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The Effect of SO2 and Ca Co-pretreatment on the Catalytic Activity of Mn–Ce/TiO2 Catalysts for Selective Catalytic Reduction of NO with NH3

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Abstract

Mn–Ce/TiO2 catalysts were co-pretreated with SO2 and Ca and applied for the selective catalytic reduction (SCR) of NO with ammonia. The effect of co-pretreatment of SO2 and Ca on the physicochemical properties of catalysts was investigated by BET, XRD, XPS, NH3-TPD, H2-TPR, and UV–Vis techniques. The results show the co-pretreatment of SO2 and Ca greatly influences the physicochemical properties of catalysts such as texture characteristics, surface acidity and redox ability, amounts of active species and surface OH group, and therefore affects the catalytic activity of catalysts. The Mn–Ce–Ti(S–OH) catalyst co-pretreated with SO2 and Ca(OH)2 exhibits better catalytic activity than Mn–Ce–Ti(S–Cl) catalyst co-pretreated with SO2 and CaCl2. The Mn–Ce–Ti(S–OH) catalyst possesses larger specific surface area, higher concentrations of surface active species and surface chemisorbed oxygen, better surface acidity and redox ability, which may contribute to the accelerated catalytic activity.

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Acknowledgements

The authors thank the financial support of the National Natural Science Foundation of China (51276039), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (17KJB610005), the Jiangsu Government Scholarship for Overseas Studies (JS-2018), and a project funded by Nanjing Xiaozhuang University (2019NXY46).

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Authors and Affiliations

  1. School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China

    Jie Zhou, Xiaobo Wang & Xuan He

  2. Geoenvironmental Research Centre, School of Engineering, Cardiff University, Cardiff, CF24 3AA, UK

    Xiaobo Wang & Hywel R. Thomas

  3. School of Energy and Environment, Southeast University, Nanjing, 210096, Jiangsu, China

    Xiaobo Wang & Keting Gui

  4. College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China

    Jia Wang

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  1. Jie Zhou
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  2. Xiaobo Wang
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Correspondence to Xiaobo Wang.

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Zhou, J., Wang, X., He, X. et al. The Effect of SO2 and Ca Co-pretreatment on the Catalytic Activity of Mn–Ce/TiO2 Catalysts for Selective Catalytic Reduction of NO with NH3. Catal Lett 150, 3287–3295 (2020). https://doi.org/10.1007/s10562-020-03229-5

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