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Article Navigation >  Green Energy&Environment  > 2020  >  5(4): 473-483
Zhaoning Song, Juncong Yuan, Zhenping Cai, Dong Lin, Xiang Feng, Nan Sheng, Yibin Liu, Xiaobo Chen, Xin Jin, De Chen, Chaohe Yang. Engineering three-layer core–shell S-1/TS-1@dendritic-SiO2 supported Au catalysts towards improved performance for propene epoxidation with H2 and O2. Green Energy&Environment, 2020, 5(4): 473-483. doi: 10.1016/j.gee.2020.11.017
Citation: Zhaoning Song, Juncong Yuan, Zhenping Cai, Dong Lin, Xiang Feng, Nan Sheng, Yibin Liu, Xiaobo Chen, Xin Jin, De Chen, Chaohe Yang. Engineering three-layer core–shell S-1/TS-1@dendritic-SiO2 supported Au catalysts towards improved performance for propene epoxidation with H2 and O2. Green Energy&Environment, 2020, 5(4): 473-483. doi: 10.1016/j.gee.2020.11.017
shu

Engineering three-layer core–shell S-1/TS-1@dendritic-SiO2 supported Au catalysts towards improved performance for propene epoxidation with H2 and O2

doi: 10.1016/j.gee.2020.11.017
  • a.

    State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, China

  • b.

    Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway

  • c.

    State Key Laboratory of Safety and Control for Chemicals, SINOPEC Qingdao Research Institute of Safety Engineering, 218 Yanansan Road, Qingdao, 266580, China

More Information
  • Corresponding author: E-mail address: xiangfeng@upc.edu.cn (Xiang Feng); E-mail address: yangch@upc.edu.cn (Chaohe Yang)
  • Received date 12 July 2020, Accepted date 18 November 2020, RevRecd date 22 October 2020, Available online 22 November 2020, Publish date 31 October 2020,
    Abstract
  • The advocacy of green chemical industry has led to the development of highly efficient catalysts for direct gas-phase propene epoxidation with green, sustainable and simple essence. The S-1/TS-1@dendritic-SiO2 material with three-layer core–shell structure was developed and used as the support for Au catalysts, which showed simultaneously fantastic PO formation rate, PO selectivity and stability (over 100 h) for propene epoxidation with H2 and O2. It is found that silicalite-1 (S-1) core and the middle thin layer of TS-1 offer great mass transfer ability, which could be responsible for the excellent stability. The designed dendritic SiO2 shell covers part of the acid sites on the external surface of TS-1, inhibiting the side reactions and improving the PO selectivity. Furthermore, three kinds of SiO2 shell morphologies (i.e., dendritic, net, mesoporous shell) were designed, and relationship between shell morphology and catalytic performance was elucidated. The results in this paper harbour tremendous guiding significance for the design of highly efficient epoxidation catalysts.

     

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