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Effect of vanadium and tungsten loading order on the denitration performance of F-doped V2O5-WO3/TiO2 catalysts

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Abstract

F-doped V2O5-WO3/TiO2 catalyst has been confirmed to have excellent denitration activity at low temperatures. Since the V2O5-WO3/TiO2 catalyst is a structure-sensitive catalyst, the loading order of V2O5 and WO3 may affect its denitration performance. In this paper, a series of F-doped V2O5-WO3/TiO2 catalysts with different V2O5 and WO3 loading orders were synthesized to investigate the effect of denitration performance at low temperatures. It was found that the loading orders led to significant gaps in denitration performance in the range of 120–240 °C. The results indicated loading WO3 first better utilized the oxygen vacancies on the TiF carrier promoting the generation of reduced vanadium species. In addition, loading WO3 first facilitated the dispersion of V2O5 thus enhanced the NH3 adsorption capacity of VWTiF. In situ DRIFT verified the rapid reaction between NO2, nitrate, and nitrite species and adsorbed NH3 over the VWTiF, confirming that the NH3 selective catalytic reduction (NH3-SCR) reaction over VWTiF at 240 °C proceeded by the Langmuir-Hinshelwood (L-H) mechanism. This research established the constitutive relationship between the loading order of V2O5 and WO3 and the denitration performance of the F-doped VWTi catalyst providing insights into the catalyst design process.

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Funding

This work was financially supported by the National Natural Science Foundation of China (52170110).

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Author notes

  1. Lifeng Deng and Tangxu Sun have equal contributions to this article.

Authors and Affiliations

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

    Lifeng Deng, Shule Zhang & Qin Zhong

  2. School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450066, People’s Republic of China

    Tangxu Sun & Yu Li

  3. China Construction Ecoenvironm Protect Technol Co, Suzhou, 215100, PR China

    Huiwen Pang & Xiang Li

  4. Shandong Aluminum Industry Corporation Limited, Zibo, 255052, People’s Republic of China

    Yunyan Zhao & Guangbo Xie

Authors
  1. Lifeng Deng
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  3. Shule Zhang
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  4. Yu Li
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Contributions

LD: conceptualization, methodology, writing—review and editing

TS: conceptualization, data curation, methodology, validation, writing—original draft

HP: investigation, formal analysis

XL: visualization, methodology

YZ: conceptualization, visualization

GX: formal analysis, methodology

SZ: funding acquisition, project administration, resources, supervision

YL: funding acquisition, project administration, resources, supervision

QZ: funding acquisition, project administration, resources, supervision

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Correspondence to Shule Zhang.

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Deng, L., Sun, T., Zhang, S. et al. Effect of vanadium and tungsten loading order on the denitration performance of F-doped V2O5-WO3/TiO2 catalysts. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33411-w

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