Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (8): 1482-1488.DOI: 10.1016/S1872-2067(12)60637-8

• Communications • Previous Articles     Next Articles

Selective hydrogenation of benzene to cyclohexene in continuous reaction device with two reaction reactors in serie over Ru-Co-B/ZrO2 catalysts

Haijie Suna,b, Shuaihui Lia, Yuanxin Zhanga, Houbing Jianga, Lianglong Quc, Shouchang Liua, Zhongyi Liua   

  1. a College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China;
    b Institute of Environmental and Catalytic Engineering, Department of Chemistry, Zhengzhou Normal University, Zhengzhou 450044, Henan, China;
    c Beijing Energy Engineering Technologies Co., Ltd, Beijing 100190, China
  • Received:2013-04-18 Revised:2013-06-20 Online:2013-08-16 Published:2013-07-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21273205), the Innovation Found for Technology Based Firms of China (10C26214104505), the China Postdoctoral Science Foundation (2012M511125), and the Scientific Research Foundation of Graduate School of Zhengzhou University.

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Abstract: A Ru-B/ZrO2 catalyst for selective hydrogenation of benzene to cyclohexene was prepared using a chemical reduction method. The effects of transition metals such as Cr, Mn, Fe, Co, Ni, Cu, and Zn on the performance of the Ru-B/ZrO2 catalyst were investigated. It was found that the addition of these transition metals all increased the B content of the Ru-B/ZrO2 catalyst. The modification of B, the ensemble effect, and the ligand effect of the second metal or metal oxide resulted in a decrease in the activity and an increase in the selectivity for cyclohexene of the Ru-B/ZrO2 catalyst. When the atomic ratio of Co/Ru was 0.06, the Ru-Co-B/ZrO2 catalyst gave a selectivity for cyclohexene of 82.8% and a cyclohexene yield of 62.8% at a benzene conversion of 75.8% at 25 min. Moreover, the benzene conversion was stable at around 40%, and the selectivity for cyclohexene and the cyclohexene yields stabilized at around 73% and 30%, respectively, in 419 h under the optimum reaction conditions in a continuous device with two reactors in series.

Key words: Benzene, Selective hydrogenation, Cyclohexene, Ruthenium, Transition metal, Boron