Study on the Amorphous Ru-Zn-B/ZrO₂ Catalyst for Selective Hydrogenation of Benzene to Cyclohexene

Liu Shouchang, Ji Yongliang, Yang Xinli, Luo Ge
(Department of Chemistry, Zhengzhou University, Zhengzhou 450052)

Abstract The Ru-Zn-B/ZrO₂ catalyst was prepared by chemical reduction method, in which Ru is an active component, Zn and B are promoters and ZrO₂ is used as a dispersant. XRD, SEM and the particle size distribution showed the amorphous character of the catalyst. Zn and ZrO₂ in the catalyst enhance the hydrophilicity of the catalyst. When Zn/Ru ratio is 2% and Ru/ZrO₂ ratio is 13%，over this catalyst the hydrogenation of benzene to cyclohexene, the selectivity to cyclohexene is in excess of 80% at 40% benzene conversion, and the activation index is better than that of Ru-Zn catalyst conventionally used in the industry.
Key words Selective hydrogenation of benzene, Cyclohexene, Amorphous catalyst, Ru-M-B/ZrO₂

苯选择加氢制环己烯Ru-Zn-B/ZrO₂非晶催化剂研究

刘寿长 姬永亮 杨新丽 罗 鸽
(郑州大学化学系 郑州 450052)

摘要 用化学还原法制备了Ru-Zn-B/ZrO₂非晶催化剂，其中Ru为活性组分, Zn和B为助剂, ZrO₂作为分散剂。XRD、SEM和粒度分布给出了Ru-Zn-B/ZrO₂的非晶特征。B与ZrO₂的存在增加了催化剂表面的亲水性。当Zn/Ru比为2%、Ru/ZrO₂比为13%时，Ru-Zn-B/ZrO₂用于苯选择加氢制环己烯, 苯转化40%时，环己烯选择性超过80%，活性指数优于工业上用的Ru-Zn催化剂。
关键词 苯部分加氢 环己烯 非晶催化剂 Ru-M-B/ZrO₂

刘寿长 男，博士，教授。从事多相催化的研究工作。
2002-02-20收稿，2002-06-16修回