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Revealing the Correlation Between Surface Acid Sites and Activity of VPO/TiO2 Catalyst

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Abstract

In this study, the acid sites on the surface of the catalyst were quantitatively analyzed by pyridine adsorption infrared spectroscopy. When the molar ratio of V/P is 5, the molar ratio of HCl/V is 3, and the calcination temperature is 450 °C, the selective catalytic reduction effect of NO over VPO/TiO2 catalyst is the best (up to 99% at 200 °C), and the acidity of the catalyst is the highest, which is 5600 μmol·g−1. The results showed that the SCR activity of VPO/TiO2 catalyst increased with the increase of acidity at low temperature. Furthermore, the correlation between the denitration activity and the surface acid level was established by means of data fitting. The results showed that the low temperature denitrification activities of all VPO/TiO2 catalysts were positively correlated with the content of weak Lewis acid center (correlation coefficient > 0.9). In conclusion, this study provides a new method for analyzing the structure–activity relationship of the catalyst and provides some theoretical basis for the design of NH3-SCR catalyst.

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Acknowledgements

This work was financially supported by the Major national R & D projects of China (2017YFB0601805), Natural Science Foundation for the Higher Education Institutions of Anhui Province of China (KJ2020A0236, KJ2019A0079) and the Key Laboratory of Metallurgical Emission Reduction & Resources Recycling by Ministry of Education at Anhui University of Technology (JKF20-04).

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Author notes

  1. Yong Jia and Mingyan Huang have contributed equally to this work.

Authors and Affiliations

  1. School of Energy and Environment, Anhui University of Technology, Ma Anshan, 243002, People’s Republic of China

    Yong Jia, Mingyan Huang, Lina Guo & Fuping Qian

  2. Department of Engineering, University of Alberta, Edmonton, T6G 1H9, Canada

    Jing Yuan

  3. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People’s Republic of China

    Yiqing Zeng & Shule Zhang

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  1. Yong Jia
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  2. Mingyan Huang
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  4. Lina Guo
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  5. Yiqing Zeng
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Correspondence to Lina Guo or Yiqing Zeng.

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Jia, Y., Huang, M., Yuan, J. et al. Revealing the Correlation Between Surface Acid Sites and Activity of VPO/TiO2 Catalyst. Catal Lett 152, 2215–2226 (2022). https://doi.org/10.1007/s10562-021-03794-3

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  • DOI: https://doi.org/10.1007/s10562-021-03794-3

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