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Preparation of nano-hollow sphere hydrolytic catalyst and study on its COS removal performance

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Abstract

Micro-nano hollow materials have become a research hotspot due to their unique structure and properties. Blast furnace gas is one of the main pollutants discharged from steelmaking, and the COS chemical property in blast furnace gas is stable, which is difficult to be effectively removed. Nano-hollow sphere composite has the advantages of large specific surface area, adjustable material size, and stable performance. It has become one of the most promising hydrolysis catalytic materials due to its good catalytic performance. In this study, the template of carbon spheres was synthesized by the glucose hydrothermal method, and activated aluminum nitrate was loaded on carbon sphere templates by the method of equal volume impregnation. Urea was used as precipitant to prepare uniform Al2O3 hollow sphere hydrolysis catalyst, and its application and removal performance in COS removal of blast furnace gas was explored. The results showed that (1) When the ratio of water to alcohol was 30 mL:90 mL and the calcination temperature was 950 ℃, the particle size of the prepared γ-Al2O3 hollow sphere hydrolysis catalyst was between 100 and 150 nm, the average pore size was 6.785 nm, the total pore volume was 0.259 cm3·g−1 and the specific surface area was 154.665 m2·g−1. (2) When the roasting temperature is 950 ℃ and the addition amount is 40 mmol, the hydrolysis catalytic efficiency of COS is the highest. After the reaction for 70 min, the hydrolysis catalytic efficiency is maintained at about 68%, and the conversion amount is 120 mg·m−3.

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Funding

This work was supported by the Key Research and Development Program of Shaanxi (Program No.2021SF-445), Shaanxi Key Laboratory of Geological Support for Coal Green Exploitation (DZBZ2021Z-01), Natural Science Basic Research Program of Shaanxi (2019JL-01) and Key Research and Development Program of Shaanxi (2019ZDLSF05-05–01).

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Authors and Affiliations

  1. School of Geology and Environment, Xi’an University of Science and Technology, Xi’an, 710054, China

    Lei Zhang, Xueying Yang, Lingbo Qi & Yuzhen Han

  2. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an, 710021, China

    Lei Zhang

  3. China National Heavy Machinery Research Institute Co., Ltd., Xi’an, 710032, China

    Lei Zhang

  4. School of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, 710048, China

    Hao Shu & Yang Jia

  5. Shaanxi Qike Environmental Technology Co., Ltd., Xi’an, 710061, China

    Rong Wang

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  1. Lei Zhang
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Correspondence to Lei Zhang.

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Zhang, L., Yang, X., Zhang, L. et al. Preparation of nano-hollow sphere hydrolytic catalyst and study on its COS removal performance. J Nanopart Res 24, 268 (2022). https://doi.org/10.1007/s11051-022-05641-x

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