摘要
以氧化活性炭（OAC）为载体、自制[Rh（COD）Cl]2为活性组分,制备了负载型催化剂[Rh（COD）Cl]2/OAC（COD为1,5-环辛二烯）,用XPS、N2吸-脱附、FTIR等对其结构进行了表征与分析,以β-蒎烯加氢反应为探针反应,考察了载体种类、氧化剂HNO3浓度、[Rh（COD）Cl]2与OAC质量比对负载型催化剂[Rh（COD）Cl]2/OAC性能的影响,在此基础上优化了β-蒎烯加氢工艺条件,并测定了催化剂（[Rh（COD）Cl]2/OAC）的重复使用性。结果表明,催化剂的最佳制备条件为：氧化活性炭为较佳载体,HNO3浓度为7.23mol/L,[Rh（COD）Cl]2与OAC质量比为1∶8.3,此时β-蒎烯转化率均值为99.94%;顺式蒎烷选择性（以只生成蒎烷计,下同）均值为88.64%;顺式蒎烷收率均值为88.59%;β-蒎烯加氢工艺的最佳条件为：反应温度50℃,反应压力3.5 MPa,催化剂用量为β-蒎烯质量的3.5%,反应时间4.0 h,此条件下β-蒎烯转化率均值为99.88%;顺式蒎烷选择性均值为89.00%;顺式蒎烷收率均值为88.90%,[Rh（COD）Cl]2/OAC催化剂在β-蒎烯加氢反应中表现出较佳的催化活性。催化剂重复使用4次后,β-蒎烯转化率仍可达89.64%,活性组分Rh的流失是造成催化剂失活的主要原因。
Supported [ Rh（COD） Cl ] 2/OAC catalysts were prepared by using oxidized activated carbon as support and self made [ Rh （COD） C1 ] 2 as active component （ COD = 1,5-cyclooctadiene）. The resulting catalysts were characterized by means of XPS, N2 adsorption-desorption and FTIR. Hydrogenation reaction of beta-pinene was used as a probe reaction to investigate the effects of carrier type, oxidant nitric acid concentration and mass ratio of Rh （COD） Cl ] 2 to OAC on the catalytic properties. On this basis, the hydrogenation conditions of beta-pinene were optimized, and the reusability of [ Rh （COD） Cl ] 2/OAC was measured. The experimental results indicated that the optimum preparation conditions of catalyst were as follows： oxidized activated carbon was used as support, nitric acid concentration was 7.23 mol/L, and the mass ratio of Rh （COD）Cl ] 2 to OAC was 1 ：8.3. Under these conditions, the catalyst showed excellent catalytic activities in the hydrogenation reaction of beta-pinene. The average conversion of beta-pinene was 99.88% ,and the average selectivity and yield of cis-pinane were 89.00% and 88.90%. Additively, the [ Rh （COD） Cl ]2/OAC still remained high activities with a conversion of 89.64% after being used for four times. The cause of deactivation of [ Rh（COD） Cl]2/OAC was that active component Rh was easy to lose in the running process.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2018年第2期246-254,共9页
Fine Chemicals
基金
国家自然科学基金(21266012)~~
