催化学报 ›› 2014, Vol. 35 ›› Issue (11): 1811-1817.DOI: 10.1016/S1872-2067(14)60151-0

• 论文 • 上一篇    下一篇

纤维二糖与葡萄糖催化转化制备乙二醇

张军营a,b, 杨小峰a, 侯宝林a, 王爱琴a, 李振雷a,b, 王华a, 张涛a   

  1. a 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连116023;
    b 中国科学院大学, 北京100049
  • 收稿日期:2014-04-29 修回日期:2014-05-10 出版日期:2014-11-06 发布日期:2014-11-06
  • 通讯作者: 王爱琴,张涛
  • 基金资助:

    国家自然科学基金(21176235,21373206,21206159).

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).

摘要:

选用纤维二糖作为探针分子, 探索纤维素催化转化制备乙二醇过程的反应路径. 分别考察了纤维二糖和葡萄糖在双组分催化剂H2WO4和Ru/C下的催化反应活性. 结果表明, 乙二醇不仅来自于纤维二糖水解产物葡萄糖的逆羟醛缩合作用, 同时也可以来自于纤维二糖的直接逆羟醛缩合过程. 而且, 纤维二糖的直接逆羟醛缩合作用对糖苷键的水解也有一定的促进作用. 比较发现, 钨基催化剂作用下纤维二糖的逆羟醛缩合反应活性比葡萄糖要低, 因此乙醇醛可以缓慢产生并在Ru/C催化剂上迅速加氢生成乙二醇. 使得以纤维二糖作为原料比以葡萄糖作为原料时获得更高的乙二醇收率.

关键词: 纤维二糖, 反应机理, 葡萄糖, 乙二醇

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