SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 45 ›› Issue (5): 162-170.DOI: 10.1016/j.cjche.2021.02.025

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Coupling effect of bifunctional ZnCe@SBA-15 catalyst in 1,3-butadiene production from bioethanol

Zheng Wang1, Sijia Li1, Shengping Wang1, Jiaxu Liu2, Yujun Zhao1, Xinbin Ma1   

  1. 1 Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China;
    2 State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2021-02-02 Revised:2021-02-10 Online:2022-06-22 Published:2022-05-28
  • Contact: Yujun Zhao,E-mail:yujunzhao@tju.edu.cn
  • Supported by:
    We appreciate the National Natural Science Foundation of China for financial support (21878227).

Coupling effect of bifunctional ZnCe@SBA-15 catalyst in 1,3-butadiene production from bioethanol

Zheng Wang1, Sijia Li1, Shengping Wang1, Jiaxu Liu2, Yujun Zhao1, Xinbin Ma1   

  1. 1 Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China;
    2 State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116024, China
  • 通讯作者: Yujun Zhao,E-mail:yujunzhao@tju.edu.cn
  • 基金资助:
    We appreciate the National Natural Science Foundation of China for financial support (21878227).

Abstract: A series of bifunctional ZnCe@SBA-15 catalysts with different Zn/Ce ratios were prepared by a solid-state grinding strategy and used in the conversion of ethanol to 1,3-butadiene (ETB). For the supported metal oxides, ZnO serves as the active sites for the dehydrogenation of ethanol, and CeO2 promotes the aldol-condensation reaction. Based on the results of Py-FTIR and NH3-TPD, it suggests that the yield of 1,3-butadiene is positively correlated with the number of weak Lewis acid sites on the catalyst surface, given their benefit for aldol-condensation reactions. The catalyst with an optimal Zn/Ce ratio of about 1:5 has the highest concentration of weak Lewis acid. Coupling with the ZnO sites, it contributes to a 98.4% conversion of ethanol and a 45.2% selective of 1,3-butadiene under relatively mild reaction conditions (375 ℃, 101.325 kPa, and 0.54 h-1).

Key words: Biomass, Catalyst, Coupling effect, Lewis acid, 1,3-butadiene, Optimization

摘要: A series of bifunctional ZnCe@SBA-15 catalysts with different Zn/Ce ratios were prepared by a solid-state grinding strategy and used in the conversion of ethanol to 1,3-butadiene (ETB). For the supported metal oxides, ZnO serves as the active sites for the dehydrogenation of ethanol, and CeO2 promotes the aldol-condensation reaction. Based on the results of Py-FTIR and NH3-TPD, it suggests that the yield of 1,3-butadiene is positively correlated with the number of weak Lewis acid sites on the catalyst surface, given their benefit for aldol-condensation reactions. The catalyst with an optimal Zn/Ce ratio of about 1:5 has the highest concentration of weak Lewis acid. Coupling with the ZnO sites, it contributes to a 98.4% conversion of ethanol and a 45.2% selective of 1,3-butadiene under relatively mild reaction conditions (375 ℃, 101.325 kPa, and 0.54 h-1).

关键词: Biomass, Catalyst, Coupling effect, Lewis acid, 1,3-butadiene, Optimization