论文部分内容阅读
以苯选择性加氢制环己烯为模型反应,考察了Ru-Zn/ZrO_2催化剂制备过程中还原方式对催化剂催化性能的影响.运用TEM、SEM、BET等技术对催化剂进行了表征.评价结果表明,采用高压液相还原制备的RuZn/ZrO_2-3催化剂在苯选择加氢制环己烯反应中表现出高催化性能,当苯转化率为41%时,环己烯选择性达到了83.8%.TEM、SEM结果表明催化剂上Ru微晶呈高分散,有利于苯转化率的提高.BET比表面积25 m~2/g,RuZn/ZrO_2-3催化剂最可几孔径分布范围20~50 nm,有利于环己烯选择性的提高.
The selective hydrogenation of cyclohexene to cyclohexene was used as the model reaction, and the effect of the reduction mode on the catalytic performance of Ru-Zn / ZrO 2 catalyst was investigated. The catalysts were characterized by TEM, SEM and BET. The results showed that the RuZn / ZrO_2-3 catalyst prepared by high pressure liquid reduction exhibited high catalytic performance in the selective hydrogenation of benzene to cyclohexene. The selectivity of cyclohexene reached 83.8% when the benzene conversion was 41% .TEM and SEM results show that the Ru microcrystal is highly dispersed on the catalyst, which is conducive to the increase of benzene conversion.The BET specific surface area of 25m ~ 2 / g, RuZn / ZrO_2-3 catalyst pore size distribution of 20 ~ 50 nm, Conducive to the increase of cyclohexene selectivity.