SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 141-150.DOI: 10.1016/j.cjche.2022.09.017

• Full Length Article • 上一篇    下一篇

Enhanced selective hydrogenation of glycolaldehyde to ethylene glycol over Cu0-Cu+ sites

Qi Yang1, Weikang Dai1, Maoshuai Li1,2,3, Jie Wei1, Yi Feng1, Cheng Yang1, Wanxin Yang1, Ying Zheng2, Jie Ding1, Mei-Yan Wang1,2,3, Xinbin Ma1,2,3   

  1. 1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
    2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China;
    3. Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
  • 收稿日期:2022-07-26 修回日期:2022-09-08 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Maoshuai Li,E-mail:maoshuaili@tju.edu.cn;Xinbin Ma,E-mail:xbma@tju.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (2018YFA0704502) and Haihe Laboratory of Sustainable Chemical Transformations (CYZC202101).

Enhanced selective hydrogenation of glycolaldehyde to ethylene glycol over Cu0-Cu+ sites

Qi Yang1, Weikang Dai1, Maoshuai Li1,2,3, Jie Wei1, Yi Feng1, Cheng Yang1, Wanxin Yang1, Ying Zheng2, Jie Ding1, Mei-Yan Wang1,2,3, Xinbin Ma1,2,3   

  1. 1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
    2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China;
    3. Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
  • Received:2022-07-26 Revised:2022-09-08 Online:2023-05-28 Published:2023-07-08
  • Contact: Maoshuai Li,E-mail:maoshuaili@tju.edu.cn;Xinbin Ma,E-mail:xbma@tju.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2018YFA0704502) and Haihe Laboratory of Sustainable Chemical Transformations (CYZC202101).

摘要: Selective hydrogenation of hydroxyaldehydes to polyalcohols is challenging due to the competitive hydrogenation of C=O and C-O. This study develops heterogeneous Cu catalysts for the selective synthesis of ethylene glycol via batch liquid-phase hydrogenation of glycolaldehyde. SiO2 supported Cu, fabricated by ammonia evaporation, enables to catalyze the C=O bond hydrogenation with retaining the C-O bond intact, yielding higher selective hydrogenation activity with ethylene glycol selectivity up to 99.8 % relative to MgO, Al2O3, CeO2, and TiO2 supports and Cu/SiO2 synthesized by deposition–precipitation and impregnation. Characterizations confirm that highly efficient 20Cu/SiO2-AE-623 K catalyst fabricated by ammonia evaporation is featured with larger Cu0 and Cu+ surface areas, of which the Cu+ species created from reducing copper phyllosilicate exhibit higher reactivity. A synergistic effect between Cu+ and Cu0 facilitates the selective adsorption/activation of glycolaldehyde on Cu+ sites and the dissociation of H2 on Cu0 sites, bringing a remarkable improvement in the selective hydrogenation performance.

关键词: Hydrogenation, Multiphase reaction, Biomass, Copper phyllosilicate, Ammonia evaporation

Abstract: Selective hydrogenation of hydroxyaldehydes to polyalcohols is challenging due to the competitive hydrogenation of C=O and C-O. This study develops heterogeneous Cu catalysts for the selective synthesis of ethylene glycol via batch liquid-phase hydrogenation of glycolaldehyde. SiO2 supported Cu, fabricated by ammonia evaporation, enables to catalyze the C=O bond hydrogenation with retaining the C-O bond intact, yielding higher selective hydrogenation activity with ethylene glycol selectivity up to 99.8 % relative to MgO, Al2O3, CeO2, and TiO2 supports and Cu/SiO2 synthesized by deposition–precipitation and impregnation. Characterizations confirm that highly efficient 20Cu/SiO2-AE-623 K catalyst fabricated by ammonia evaporation is featured with larger Cu0 and Cu+ surface areas, of which the Cu+ species created from reducing copper phyllosilicate exhibit higher reactivity. A synergistic effect between Cu+ and Cu0 facilitates the selective adsorption/activation of glycolaldehyde on Cu+ sites and the dissociation of H2 on Cu0 sites, bringing a remarkable improvement in the selective hydrogenation performance.

Key words: Hydrogenation, Multiphase reaction, Biomass, Copper phyllosilicate, Ammonia evaporation