Ru–Cd/Bentonite for the Partial Hydrogenation of Benzene: A Catalyst without Additives

Authors

  • Weitao Wang,

    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Dr. Huizhen Liu,

    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Guodong Ding,

    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Peng Zhang,

    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Dr. Tianbin Wu,

    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Prof. Dr. Tao Jiang,

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
    • Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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  • Prof. Dr. Buxing Han

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
    • Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86)-10-62562821
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Abstract

Clays are very promising, environmentally benign catalyst supports. Herein, Ru–Cd/bentonite (BEN) catalysts were prepared and characterized by TEM, SEM, XPS, and XRD. The as-prepared catalysts were used to catalyze the selective hydrogenation of benzene into cyclohexene with different Ru/Cd molar ratios, hydrogen pressures, and reaction temperatures. We found that the catalytic activity decreased with decreasing Ru/Cd molar ratio, whereas the selectivity was enhanced. The most-favorable Ru/Cd molar ratio was 1 and the optimal hydrogen pressure and temperature were 5 MPa and 150 °C, respectively. The yield of cyclohexene reached 24.8 % over Ru–Cd/BEN under the optimal reaction conditions without the need for any additives in the reaction system and this catalyst could be reused several times in the reaction without a drop in the yield of cyclohexene. The Cd in the catalyst enhanced the selectivity for cyclohexene. Furthermore, Cd/BEN could be used an as effective supported additive to promote the hydrogenation of benzene into cyclohexene catalyzed by Ru/BEN or Ru/SBA-15.

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