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Citation: Wen-Xiang GAO, Jie WEN, Jie DENG, Hai-Di XU, Yong-Dong CHEN. Effect of hydrothermal aging on NH3-SCR performance of Cu-modified W/CeTi catalyst[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(10): 1877-1886. doi: 10.11862/CJIC.2023.153 shu

Effect of hydrothermal aging on NH3-SCR performance of Cu-modified W/CeTi catalyst

  • 1.

    College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

  • 2.

    Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan 610207, China

  • 3.

    Tianfu Yongxing Laboratory, Chengdu, Sichuan 610213, China

Figures(8)

  • CuW/CeTi and W/CuCeTi catalysts were prepared by impregnation method. The effects of different action modes of Cu on denitrification performance of NH3 selective catalytic reduction of NOx (NH3-SCR) reaction were investigated. Studies showed that fresh CuW/CeTi and W/CuCeTi exhibited excellent activity at low temperature. After 800 ℃ and 10 h hydrothermal aging, W/CuCeTi showed better denitration performance than CuW/CeTi, which proves that W/CuCeTi has higher hydrothermal stability. Then, these catalysts were characterized by transmission electron microscope (TEM), X - ray diffraction (XRD), Raman spectrum (Raman), N2 physical adsorption - desorption, X-ray photoelectron spectroscopy (XPS), ammonia temperature-programmed desorption (NH3-TPD) and hydrogen temperature-programmed reduction (H2-TPR). It was found that the Cu-O-Ce structure formed by Cu doping can improve the anti-sintering ability of CeTi, weaken the interaction of W-CeO2, and thus inhibits the formation of Ce2(WO4)3 in the aging process. Therefore, W/CuCeTi shows better hydrothermal stability.
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