Selective conversion of furfuryl alcohol to 1,2-pentanediol over a Ru/MnOx catalyst in aqueous phase
作者:Bin Zhang、Yulei Zhu、Guoqiang Ding、Hongyan Zheng、Yongwang Li
DOI:10.1039/c2gc36270h
日期:——
The aqueous-phase hydrogenolysis of furfuryl alcohol (FFA) to 1,2-pentanediol (1,2-PeD) was carried out on a series of supported Ru catalysts and MnOx supported Pt, Pd and Rh catalysts. The Ru/MnOx catalysts showed high selectivity for 1,2-PeD, while the Pd and Rh catalysts displayed high selectivity for tetrahydrofurfuryl alcohol. The function of MnOx, the effects of solvent, temperature, H2 pressure and reaction time were further investigated. The support MnOx in the Ru/MnOx catalysts not only suppressed the polymerization of the FFA, but also enhanced the 1,2-PeD selectivity. Low pressure and high temperature favoured the generation of 1,2-PeD, and water significantly enhanced the reaction rate. At 150 °C, 1.5 MPa, the yield of 1,2-PeD was up to 42.1% over the Ru/MnOx catalyst. The proposed mechanism for FFA hydrogenolysis in aqueous medium over the Ru/MnOx catalyst is suggested to occur via a partially hydrogenated intermediate.
在水相中,将糠醇(FFA)通过一系列负载型Ru催化剂和MnOx负载的Pt、Pd和Rh催化剂进行氢解反应,制备1,2-戊二醇(1,2-PeD)。Ru/MnOx催化剂显示出对1,2-PeD的高选择性,而Pd和Rh催化剂则对四氢糠醇显示出高选择性。进一步研究了MnOx的功能、溶剂、温度、氢压和反应时间的影响。Ru/MnOx催化剂中的载体MnOx不仅抑制了FFA的聚合,还提高了1,2-PeD的选择性。低压和高温度有利于1,2-PeD的生成,而水显著提高了反应速率。在150°C、1.5 MPa下,Ru/MnOx催化剂上的1,2-PeD产率高达42.1%。对于Ru/MnOx催化剂在水相中FFA氢解反应的机理,提出是通过部分氢化的中间体进行的。