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Vanadium Substitution as an Effective Way to Enhance the Redox Ability of Tungstophosphoric Acid and for Application of NH3-SCR

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Abstract

A novel TiO2-supported vanadium-substituted tungstophosphoric acid (PW11V/TiO2) catalyst was designed and applied for selective catalytic reduction of NOx by NH3. Compared with the commercial tungstophosphoric acid (PW12/TiO2), PW11V/TiO2 displayed a nearly 90% activity improvement at 300 °C. In addition, the favorable resistance and stability to SO2 were also obtained over PW11V/TiO2 catalyst. Phase analysis and spectroscopy results indicated the vanadium was successfully incorporated into the molecular structure of PW12, and the Keggin framework still keep stable over the TiO2 support. H2-TPR test proved the incorporation of vanadium promoted the redox ability of PW11V. The present study provides us an effective way to improve the performance of catalytic removal of NOx through tungstophosphoric acid catalyst.

Graphic Abstract

After introduction of V species, the obtained PW11V/TiO2 catalyst show better NH3-SCR performance and N2 selectivity than PW12/TiO2 catalyst.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (21876093, 11675098, 11975147, 12075148), and the National Key Research, Development Program (2017YFC0210700 and 2018YFC0213400) and by Program for Changjiang Scholars. The Innovative Research Team in University No. IRT_17R71 was also acknowledged.

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Authors and Affiliations

  1. Shanghai Applied Radiation Institute, Shanghai University, Shanghai, 200444, China

    Qi Liu, Shihao Wang, Gang Xu & Minghong Wu

  2. National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing, 100084, People’s Republic of China

    Qi Liu, Shihao Wang, Jianjun Chen & Junhua Li

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  1. Qi Liu
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  2. Shihao Wang
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  3. Gang Xu
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  6. Junhua Li
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Correspondence to Gang Xu.

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Liu, Q., Wang, S., Xu, G. et al. Vanadium Substitution as an Effective Way to Enhance the Redox Ability of Tungstophosphoric Acid and for Application of NH3-SCR. Catal Lett 151, 2250–2256 (2021). https://doi.org/10.1007/s10562-020-03467-7

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