化工进展2017，Vol.36Issue(8)：2962-2970,9.DOI:10.16085/j.issn.1000-6613.2016-2247
还原介质和还原温度对Ru-Zn催化苯选择加氢制环己烯性能的影响
Effect of reduction medium and reduction temperature on the performance of Ru-Zn catalysts for selective hydrogenation of benzene to cyclohexene
摘要
Abstract
The catalysts of Ru-Zn(5％NaOH),Ru-Zn(H2O),Ru-Zn(0.035mol/L ZnSO4) and Ru-Zn(0.145mol/L ZnSO4) were prepared by H2 reduction in 5％ NaOH,distilled water,0.035mol/L ZnSO4 and 0.145mol/L ZnSO4 using a co-precipitation method.The activities of the catalysts for selective hydrogenation of benzene to cyclohexene were in the order of:Ru-Zn(5％NaOH)＞ Ru-Zn(H2O) ＞ Ru-Zn(0.035mol/L ZnSO4) ≈ Ru-Zn(0.145mol/L ZnSO4),but their selectivities to cyclohexene were in the inverse order.The reason is that the reduction media could influence the composition and texture properties of the Ru-Zn catalysts,and further affects their catalytic performance.The Ru-Zn(H2O) catalyst gave the highest cyclohexene yield among these catalysts,suggesting that the distilled water was the best reduction medium.The specific surface of Ru-Zn(H2O) catalysts decreased with the increase of the reduction temperature,and the activity of the catalysts was lowered.Meanwhile,the particle sizes of the Ru-Zn catalysts increased resulting in the decrease of numbers of the comer sites and the edge sites on the catalysts suitable for hydrogenation of cyclohexene to cyclohexane.Thus the selectivity to cyclohexene increased with the increase of the reduction temperature.The Ru-Zn(H2O) catalyst reduced at 100℃ gave a cyclohexene yield of 58.1％.关键词
苯/加氢/环己烯/催化剂/钌/锌Key words
benzene/hydrogenation/cyclohexene/catalyst/ruthenium/zinc分类
化学化工引用本文复制引用
孙海杰,陈凌霞,黄振旭,孙良玲,李永宇,刘寿长,刘仲毅..还原介质和还原温度对Ru-Zn催化苯选择加氢制环己烯性能的影响[J].化工进展,2017,36(8):2962-2970,9.基金项目
国家自然科学基金(21273205,21543011,U1304204)、河南省科技攻关项目(162102210333)、河南省高等学校重点科研项目(16A150025)及河南省高校科技创新团队支持计划(16IRTSTHN001)项目. （21273205,21543011,U1304204）
