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.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第2期150-152,共3页
关键词
二氧化锆
钌
锌
苯
选择加氢
环己烯
zirconia
ruthenium
zinc
benzene
selective hydrogenation
cyclohexene
