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采用化学还原法制备了负载型Ru-B/γ-Al_2O_3非晶态合金催化剂,并将其应用于对苯二酚液相加氢制备1,4-环己二醇反应。采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、热重分析(TGA)、物理吸脱附技术对催化剂的性能进行了表征。研究了Ru负载量、反应温度、氢气压力、反应时间对催化剂性能的影响。结果表明,在对苯二酚加氢反应中,最佳优化反应条件为:Ru质量分数为1.0%,反应温度为140℃,反应时间为3.5 h,氢气压力为3.0 MPa。此时,对苯二酚转化率为86.23%,目标产物1,4-环己二醇选择性为86.54%。且该催化剂具有较好的热稳定性,具有良好的工业化应用前景。
The supported Ru-B / γ-Al_2O_3 amorphous alloy catalysts were prepared by chemical reduction method and applied to the hydro-hydroquinone hydroquinone production of 1,4-cyclohexanediol. The performance of the catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and physical adsorption desorption. The effects of Ru loading, reaction temperature, hydrogen pressure and reaction time on the catalyst performance were investigated. The results showed that the optimal reaction conditions for hydrogenation of hydroquinone were as follows: the mass fraction of Ru was 1.0%, the reaction temperature was 140 ℃, the reaction time was 3.5 h and the pressure of hydrogen was 3.0 MPa. At this point, the conversion of hydroquinone was 86.23% and the selectivity to 1,4-cyclohexanediol was 86.54%. And the catalyst has good thermal stability, with good industrial application prospects.