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Preparation of Modified UiO-66 Catalyst and Its Catalytic Performance for NH3-SCR Denitration

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Abstract

Zirconium-based metal-organic framework UiO-66 was successfully prepared by solvothermal method, and UiO-66 was modified by adding regulators such as formic acid, acetic acid, and hydrochloric acid. The NH3-SCR reactivity of the samples was evaluated by the denitration activity evaluation system, and the UiO-66 and the regulator-modified UiO-66 were characterized by XRD, SEM, BET, FTIR, TG, NH3-TPD, etc., the effects of regulator types on the structure and properties of UiO-66 were investigated. The experimental results show that, after adding the modifier, the morphology of UiO-66 changes from irregular quadrilateral with serious agglomeration to particles with regular crystal shape and good dispersibility, and the crystal morphology of the catalyst is improved. In addition, after adding the modifier, UiO-66 has a larger specific surface area and stronger surface acidity, which optimizes the catalytic performance of UiO-66. The catalytic performance test results of NH3-SCR show that the low-temperature activity of UiO-66 is poor, and it only shows a certain catalytic activity at higher temperatures. The catalytic activity of UiO-66 was significantly improved after adding the regulator. Among them, the UiO-66-HCl modified with hydrochloric acid had the best catalytic activity, and the denitration rate reached 70% when the denitration temperature was 380 °C.

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Authors and Affiliations

  1. Ceramics Science Institute, China Building Materials Academy, Beijing, 10002, China

    Yanxia Wu  (吴彦霞), Hailong Liang  (梁海龙), Yufeng Chen, Liming Hu & Chunpeng Wang

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  1. Yanxia Wu  (吴彦霞)
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  2. Hailong Liang  (梁海龙)
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  3. Yufeng Chen
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  4. Liming Hu
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  5. Chunpeng Wang
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Correspondence to Hailong Liang  (梁海龙).

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All authors declare that there are no competing interests.

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Funded by the National Key Research and Development Program of China (No. 2016YFC0209302)

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Wu, Y., Liang, H., Chen, Y. et al. Preparation of Modified UiO-66 Catalyst and Its Catalytic Performance for NH3-SCR Denitration. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 39, 261–267 (2024). https://doi.org/10.1007/s11595-024-2879-5

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  • DOI: https://doi.org/10.1007/s11595-024-2879-5

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