Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (11): 1285-1292.DOI: 10.11944/j.issn.1000-0518.2020.11.200109

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Catalytic Conversion of γ-Valerolactone to 1,4-Pentanediol on CuZn/Al2O3 Catalyst

LIU Qianga,b, ZHAO Zhenboa*, ZHANG Chaob, ZHAO Fengyub*   

  1. aSchool of Chemistry and Life Science,Changchun University of Technology,Changchun 130012,China;
    bState Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2020-04-15 Revised:2020-04-30 Accepted:2020-06-09 Online:2020-11-01 Published:2020-11-04
  • Contact: ZHAO Zhenbo, professor; Tel:0431-85716671;; Research interests:catalytic materials
    Co-corresponding author:ZHAO Fengyu, professor; Tel:0431-85262410;; Research interests:heterogeneous catalysis

Abstract: Biomass conversion is one of the most effective ways for alleviating the energy and environmental crisis. A series of CuZn/Al2O3 catalysts was prepared by co-precipitation method and the structure and properties of the catalysts obtained were characterized by several techniques such as inductively coupled plasma (ICP), X-ray diffraction (XRD), transmission electron microscopy (TEM), and CO2-temperature programmed desorption (TPD). We focused our attention on the effects of reduction temperature on the catalytic performances of CuZn/Al2O3 catalysts in γ-valerolactone hydrogenation. It is found that reduction of temperature significantly influences the activity and selectivity of CuZn/Al2O3 catalysts, that is, the larger reduction temperature benefits for the formation of 1,4-pentanediol, and a high selectivity of 98% is achieved over the catalyst at 440 ℃, while it is only 71% on the catalyst reduced at 200 ℃. Based on the structure analysis of the catalyst, it is concluded that the high reduction temperature can promote the reduction of ZnO and generate new surface active sites and vary the surface basic-acid properties, thus result in the improvement of 1,4-pentanediol selectivity.

Key words: Cu-based catalysts, valerolactone, pentanediol, reduction temperature, basic sites, selectivity

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