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Enhanced Water and Sulfur Resistance by Sm3+ Modification of Ce–Mn/TiO2 for NH3-SCR

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Abstract

A series of xSm–4Ce–10Mn/TiO2 (x = 0, 2, 4, 6, 8, 10) catalysts were prepared by a reverse co-precipitation method. The catalysts were characterized by XRD, TEM, IR and XPS, and the effects of Sm loading on NO conversion and H2O/SO2 resistance were investigated. Results showed the xSm–4Ce–10Mn/TiO2 exhibited the best low-temperature catalytic activity, N2 selectivity and H2O/SO2 resistance at x = 10. The electronic interactions between Sm and other metals caused the decrease of Mn4+ and Ce3+ content on the surface of the Sm modified catalysts, which was not favorable for the low-temperature activity. However, the increase of surface adsorbed oxygen content contributed to improving the low-temperature activity. In addition, the introduction of Sm resulted in less deposition and easy decomposition of (NH4)2SO4 on the catalyst surface, which improved the H2O/SO2 resistance of the catalyst.

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Acknowledgements

The research was supported by the National Natural Science Foundation of China under Grant No. 51978556, Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy under grant no. YLU-DNL Fund 2021006, and Major Scientific and Technological Innovation Projects of Shandong Province under Grant No. 2019JZZY010343.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, Shaanxi, China

    Huidong Xie, Peiwen He & Cheng Chen

  2. Division of Laboratory and Equipment Management, Xi’an University of Architecture and Technology, Xi’an, 710055, Shaanxi, China

    Chang Yang

  3. Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, Shaanxi, People’s Republic of China

    Shouning Chai

  4. College of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, 710054, Shaanxi, China

    Na Wang

  5. Shandong Dongyuan New Material Technology Co., Ltd., Dongying, 257300, Shandong, China

    Chengmin Ge

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  1. Huidong Xie
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Xie, H., He, P., Chen, C. et al. Enhanced Water and Sulfur Resistance by Sm3+ Modification of Ce–Mn/TiO2 for NH3-SCR. Catal Lett 153, 850–862 (2023). https://doi.org/10.1007/s10562-022-04023-1

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