Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (11): 1811-1817.DOI: 10.1016/S1872-2067(14)60151-0

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Comparison of cellobiose and glucose transformation to ethylene glycol

Junying Zhanga,b, Xiaofeng Yanga, Baolin Houa, Aiqin Wanga, Zhenlei Lia,b, Hua Wanga, Tao Zhanga   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-04-29 Revised:2014-05-10 Online:2014-11-06 Published:2014-11-06
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21176235, 21373206, and 21206159).

Abstract:

Cellobiose was used as a model feedstock to probe the reaction pathways of cellulose to ethylene glycol (EG). Its reactivity was compared with that of glucose using a catalyst composed of H2WO4 and Ru/C. EG can be produced by both the direct retro-aldol condensation of cellobiose and the retro-aldol condensation of glucose derived from cellobiose hydrolysis. The direct retro-aldol condensation of cellobiose further promoted the hydrolysis of cellobiose. Cellobiose has a lower reactivity for retro-aldol condensation than glucose, which decreased the formation rate of glycolaldehyde and made it more matched with the subsequent hydrogenation rate, thus leading to increased yield of EG from cellobiose.

Key words: Cellobiose, Reaction mechanism, Glucose, Ethylene glycol