Chem. J. Chinese Universities ›› 2019, Vol. 40 ›› Issue (8): 1686.doi: 10.7503/cjcu20190068

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Ni-Al2O3 Catalysts Derived from Hydrotalcite and Its Catalytic Performance for Hydrogenation of Levulinic Acid

ZHANG Yin, GUO Jianjian, WANG Jie, LI Haitao, ZHAO Yongxiang   

  1. Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
  • Received:2019-01-23 Revised:2019-07-23 Online:2019-08-10 Published:2019-08-02
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21303097) and the Shanxi International Science and Technology Cooperation Project, China(No.201803D421074).

Abstract: A series of Ni-Al2O3 catalysts with different Ni/Al molar ratios was prepared using NiAl-NO3-LDH as precursors and characterized by means of N2-physical adsorption, ICP-OES, TG/DTG, XRD, XPS, H2-TPR/TPD and NH3-TPD techniques. The catalytic performance of these catalysts for liquid phase hydrogenation of levulinic acid was valuated. The results demonstrated that with the increasing of Ni/Al molar ratio, isolated γ-AlOOH species evolved dissociative Ni(OH)2 which existed in the hydrotalcite-like laminate structure, the interaction between metal-support in catalyst become weaker, the dispersion of Ni species decreased, surface acidic sites increased first and then decreased. When Ni/Al molar ratio is 3, the catalyst had the most abundant acidic and hydrogenation sites and exhibited the high performance for the hydrogenation of levulinic acid to γ-valerolactone. 92.7% yield of γ-valerolactone was obtained under the condition of 160℃, 4 MPa H2 pressure.

Key words: Levulinic acid, Ni-Al2O3 catalyst, γ-Valerolactone, Catalytic hydrogeation

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