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Efficient Hydrodeoxygenation of Aliphatic Ketones over an Alkali-Treated Ni/HZSM-5 Catalyst

Authors

  • Dr. Xiangjin Kong,

    1. School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072 (P.R. China)
    2. College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059 (P.R. China)
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  • Weichi Lai,

    1. Shaoxing Xingxin Chemical Co., Ltd. Shaoxing 312000 (P.R. China)
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  • Dr. Jun Tian,

    1. School Chemical Engineering and Technology, Tianjin University, Tianjin 300072 (P.R. China), Fax:(+86) 22-27406314
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  • Dr. Yang Li,

    1. School Chemical Engineering and Technology, Tianjin University, Tianjin 300072 (P.R. China), Fax:(+86) 22-27406314
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  • Dr. Xilong Yan,

    1. School Chemical Engineering and Technology, Tianjin University, Tianjin 300072 (P.R. China), Fax:(+86) 22-27406314
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  • Prof. Dr. Ligong Chen

    Corresponding author
    1. School Chemical Engineering and Technology, Tianjin University, Tianjin 300072 (P.R. China), Fax:(+86) 22-27406314
    • School Chemical Engineering and Technology, Tianjin University, Tianjin 300072 (P.R. China), Fax:(+86) 22-27406314

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Abstract

Cyclohexanone was chosen as a model substrate to evaluate certain catalysts for the hydrodeoxygenation of aliphatic ketones in a fixed-bed reactor. The experimental results indicated that alkali-treated Ni/HZSM-5 exhibited excellent performance for this reaction. Two aspects of the catalyst are enhanced by alkaline treatment; the amount of strong acid sites on the catalyst is sharply reduced, and also a large number of mesopores are generated in the catalyst. The decrease of strong acid sites suppresses the formation of low-boiling products and aldol-condensation side products, while the mesopores improved hydrogenation and dehydration performances of the catalyst. These two aspects also promoted the catalyst’s excellent time-on-stream performance. Additionally, generality of the catalyst is proved; most of the selected carbonyl compounds can be hydrodeoxygenated to the corresponding alkanes with selectivities of more than 97.0 %.

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