SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 60 ›› Issue (8): 186-193.DOI: 10.1016/j.cjche.2023.06.008

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Ultra-stable Cu-based catalyst for dimethyl oxalate hydrogenation to ethylene glycol

Peipei Ai1, Huiqing Jin1, Jie Li2, Xiaodong Wang1, Wei Huang1   

  1. 1. State Key Laboratory of Clean and Efficient Coal Utilization, College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
    2. CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
  • Received:2023-02-07 Revised:2023-06-04 Online:2023-10-28 Published:2023-08-28
  • Contact: Xiaodong Wang,E-mail:wangxiaodong@tyut.edu.cn;Wei Huang,E-mail:huangwei@tyut.edu.cn
  • Supported by:
    This work was financially supported by National Natural Science Foundation of China (22008166); Natural Science Foundation of Shanxi (201901D211047); and Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2019L0185).

Ultra-stable Cu-based catalyst for dimethyl oxalate hydrogenation to ethylene glycol

Peipei Ai1, Huiqing Jin1, Jie Li2, Xiaodong Wang1, Wei Huang1   

  1. 1. State Key Laboratory of Clean and Efficient Coal Utilization, College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
    2. CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
  • 通讯作者: Xiaodong Wang,E-mail:wangxiaodong@tyut.edu.cn;Wei Huang,E-mail:huangwei@tyut.edu.cn
  • 基金资助:
    This work was financially supported by National Natural Science Foundation of China (22008166); Natural Science Foundation of Shanxi (201901D211047); and Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2019L0185).

Abstract: Dimethyl oxalate (DMO) hydrogenation is a crucial step in the coal to ethylene glycol (CTEG) process. Herein, Cu catalyst supported on fibrous mesoporous silica (Cu/FMS) was synthesized via liquid phase deposition technique and applied for the DMO hydrogenation to EG. The catalyst exhibited a remarkable EG selectivity of 96.95% and maintained its activity without deactivation for 1000 h. Fibers of FMS support and liquid phase deposition technology cooperated to give high dispersion of Cu species in the Cu/FMS catalyst, resulting in a high Cu surface area. The formation of Si—O—Cu during catalyst preparation process increased the Cu+/(Cu0 + Cu+) ratio and enhanced the thermal and valence stability of Cu species. The high Cu+ surface area and Cu stability (thermal and valence stability) of the Cu/FMS catalyst were key factors for achieving superior EG selectivity and ultra-high stability.

Key words: Stability, Cu+ surface area, Fibrous mesoporous silica, Catalyst, Hydrogenation

摘要: Dimethyl oxalate (DMO) hydrogenation is a crucial step in the coal to ethylene glycol (CTEG) process. Herein, Cu catalyst supported on fibrous mesoporous silica (Cu/FMS) was synthesized via liquid phase deposition technique and applied for the DMO hydrogenation to EG. The catalyst exhibited a remarkable EG selectivity of 96.95% and maintained its activity without deactivation for 1000 h. Fibers of FMS support and liquid phase deposition technology cooperated to give high dispersion of Cu species in the Cu/FMS catalyst, resulting in a high Cu surface area. The formation of Si—O—Cu during catalyst preparation process increased the Cu+/(Cu0 + Cu+) ratio and enhanced the thermal and valence stability of Cu species. The high Cu+ surface area and Cu stability (thermal and valence stability) of the Cu/FMS catalyst were key factors for achieving superior EG selectivity and ultra-high stability.

关键词: Stability, Cu+ surface area, Fibrous mesoporous silica, Catalyst, Hydrogenation