Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (12): 2806.doi: 10.7503/cjcu20130651

• Physical Chemistry • Previous Articles     Next Articles

Hydrodeoxygenation of Guaiacol over Nickel-based Catalyst Supported on Mixed Oxides

KONG Wei1,2, ZHANG Xing-Hua2, ZHANG Qi2, WANG Tie-Jun2, MA Long-Long1,2, CHEN Guan-Yi1   

  1. 1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
    2. Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
  • Received:2013-07-12 Online:2013-12-10 Published:2013-09-29

Abstract:

Using bimetal mixed oxides Al2O3-SiO2, Al2O3-TiO2, TiO2-SiO2 and TiO2-ZrO2 as supports, nickel catalysts were tested through hydrodeoxygenation(HDO) reaction of guaiacol and characterized by Brunauer-Emmett-Teller(BET), X-ray diffraction(XRD), NH3 temperature programme desorption(NH3-TPD) and H2 temperature programme reduction(H2-TPR) techniques. The effects of support, solvent, reaction temperature and pressure on conversion of guaiacol and selectivity of different products were studied. The resistance of coke, recyclability of catalyst and the reaction mechanism for guaiacol hydrodeoxygenation were also discussed. The results show that the activities of Ni/TiO2-ZrO2 are obviously better than the others under the same reaction conditions. The conversion of guaiacol over Ni/TiO2-ZrO2 catalyst is 100% and the selectivity for cyclohexane is as high as 86.4% under the optimization condition of 300 ℃ and the initial H2 pressure of 4 MPa in decalin. Moreover, the Ni/TiO2-ZrO2 catalyst has a better performance of anti-coking than traditional catalysts, about only 3.2%(mass fraction) of residual cokes on the catalyst surface.

Key words: Mixed oxides, Nickel-based catalyst, Guaiacol, Hydrodeoxygenation(HDO)

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