中文摘要：

采用化学还原法制备了苯选择加氢制环己烯催化剂Ru-B/ZrO2, 考察了Cr, Mn, Fe, Co, Ni, Cu和Zn等过渡金属的添加对Ru-B/ZrO2催化剂性能的影响. 结果表明, 这些过渡金属的添加均可提高Ru-B/ZrO2催化剂中的B含量. B的修饰及第二种金属或金属氧化物的集团效应和配位效应导致Ru-B/ZrO2催化剂活性降低和环己烯选择性升高. 当Co/Ru原子比为0.06时, Ru-Co-B/ZrO2催化剂上反应25 min苯转化率为75.8%时, 环己烯选择性和收率分别为82.8%和62.8%. 在双釜串联连续反应器中和优化反应条件下, Ru-Co-B/ZrO2催化剂使用419 h内苯转化率稳定在40%左右, 环己烯选择性和收率分别稳定在73%和30%左右.

英文摘要：

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.