Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (11): 2041-2046.DOI: 10.1016/S1872-2067(12)60686-X

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Catalytic conversion of Jerusalem artichoke stalk to ethylene glycol over a combined catalyst of WO3 and Raney Ni

Likun Zhoua,b, Jifeng Panga, Aiqin 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:2013-04-04 Revised:2013-06-05 Online:2013-10-18 Published:2013-10-18
  • Contact: Tao Zhang
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2009CB226102) and the National Natural Science Foundation of China (21176235).

Abstract:

Jerusalem artichoke stalk (JAS) was employed as the feedstock for the production of ethylene glycol (EG) with a combined catalyst comprising commercial WO3 and Raney Ni. The raw JAS contains 51.6 wt% cellulose, 10.3 wt% hemicellulose, 17.2 wt% lignin, 1.7 wt% ash, and 19.2 wt% water-soluble substances. It was found that the lignin component in the JAS had little effect on the conversion of hemicellulose while the water-soluble substances caused a negative effect, which led to an EG yield of only 29.9%. After a simple hot water pretreatment, most of the water-soluble substances were removed, and the EG yield was increased to 37.6%. Moreover, the hot water pretreatment also led to an improvement in the durability of the catalyst. The effects of reaction temperature and reaction duration were also investigated.

Key words: Lignocellulose, Jerusalem artichoke stalk, Tungsten trioxide, Raney nickel, Ethylene glycol