AgRu双金属催化剂在乙二醇选择加氢中的研究

摘要

Ethanol is an important organic solvent and raw material in chemical production. The catalysts in the research were AgRu bimetallic catalysts, which were prepared by the ammonia evaporation method, catalytic properties of catalysts were systemically investigated, using the technologies of XRD, BET, TEM and the evaluation of catalytic activity was conducted in a autoclave. Investigate Ru impact on the catalytic hydrogenation in ethylene glycol in the performance of Ag / SiO2 catalyst. Under the conditions of reaction temperature of 175 ℃, reaction pressure of 2. 0 MPa, the reaction activity with the addition of Ru was inhibitory, but promoting the selective hydrogenation of C-C. The main reason of this result may be due to add Ru, which changed the activation ability of Ag nanoparticles on the C-O.%乙醇是化工生产中重要的有机溶剂和生产原料。通过氨蒸法制备新型的 AgRu 双金属负载 SiO2催化剂,采用 XRD、BET 和 TEM 等对催化剂进行表征,考察 Ru 的加入对 Ag/ SiO2催化剂在乙二醇加氢中催化性能的影响。当在反应温度175℃,压力2 MPa 条件下, Ru 的加入,对反应活性起到抑制作用,但可促进 C-C 键的选择加氢。产生这个结果的主要原因可能是由于当Ru 的加入,改变了 Ag 纳米颗粒对 C-O 键的活化能力。