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Improvement in alkali metal resistance of commercial V2O5–WO3/TiO2 SCR catalysts modified by Ce and Cu

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Abstract

Commercial V2O5–WO3/TiO2 (abbreviated to VWTi) SCR catalysts are modified with Ce and different contents of Cu in wet impregnation method to improve their alkali metals resistance, which is beneficial for prolonging their service life. After K poisoning, NOx conversion of VWCeCuTi sample modified with 0.30% Ce and 0.05% Cu is 89% at 350 °C, which is obviously higher than that of VWTi with a 50% NOx conversion. A series of characterization tests were conducted and verified that the ratio of V5+ and the surface-active oxygen on VWCeCuTi sample increases due to the interaction between V, Ce and Cu. Additionally, with the addition of Ce and Cu, surface acid sites are increased and their stability is strengthened. The enhanced redox property and surface acidity contribute together to the excellent K resistance of VWCeCuTi catalyst.

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Acknowledgements

This work is financially supported by the Natural Science Foundation of Fujian Province, China (2016J05048), Fujian Institute of Innovation, Chinese Academy of Sciences, Bureau of Science and Technology, Fujian Province, China (2015H0043), National Natural Science Foundation of China (21403210).

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Authors and Affiliations

  1. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People’s Republic of China

    Huirong Li, Jifa Miao, Qingfa Su, Yanting Chen, Jinsheng Chen & Jinxiu Wang

  2. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People’s Republic of China

    Huirong Li, Jifa Miao, Qingfa Su, Yanting Chen, Jinsheng Chen & Jinxiu Wang

  3. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Huirong Li, Jifa Miao & Qingfa Su

  4. Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Yanke Yu

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  1. Huirong Li
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Li, H., Miao, J., Su, Q. et al. Improvement in alkali metal resistance of commercial V2O5–WO3/TiO2 SCR catalysts modified by Ce and Cu. J Mater Sci 54, 14707–14719 (2019). https://doi.org/10.1007/s10853-019-03919-5

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