纳米ZrO_2作分散剂的Ru-Zn催化剂上苯选择加氢制环己烯  

Selective Hydrogenation of Benzene to Cyclohexene over Ru-Zn Catalyst with Nanosized Zirconia as Dispersant

作　　者：刘仲毅[1] 孙海杰[1] 王栋斌[1] 郭伟[1] 周小莉[1] 刘寿长[1] 李中军[1] 

机构地区：[1]郑州大学化学系,河南郑州450001

出　　处：《催化学报》2010年第2期150-152,共3页

摘　　要：采用水热法合成了比表面积分别为34和87m2/g的ZrO2样品(分别记为ZrO2-34和ZrO2-87),并考察了它们作分散剂时Ru-Zn催化剂上苯选择加氢制环己烯反应的性能.结果表明,两个ZrO2样品具有相近的纯度和物相,晶粒粒径分别为21.6和11.4nm.其中ZrO2-34具有较小的比表面积、较大的孔径、较小的粒径、集中的粒度分布和较大的堆密度,因而更适合用作苯选择加氢制环己烯Ru-Zn催化剂的分散剂,且循环使用多次催化剂仍表现出较高的选择性和稳定性.Nanosized zirconia was prepared by hydrothermal synthesis. The effect of zirconia with surface areas of 34 and 87 m^2/g （denoted ZRO2-34 and ZRO2-87, respectively） used as a dispersant on the catalytic performance of the Ru-Zn catalyst was investigated. The crystallite sizes of ZRO2-34 and ZRO2-87 were 21.6 and 11.4 nm, respectively. The two samples had similar purity and phases. Cyclohexene selectivity and the stability of the Ru-Zn catalyst dispersed using ZRO2-34 were better than that using ZRO2-87. This was due to the smaller surface area, bigger pore diameter, smaller particle size, narrower particle distribution, and bigger bulk density of ZRO2-34.

关 键 词：二氧化锆 钌 锌 苯 选择加氢 环己烯 

分 类 号：O643.36[理学—物理化学]