镍促进的碳化钨催化转化葡萄糖制乙二醇

Catalytic Conversion of Glucose to Ethylene Glycol by Nickel-promoted Tungsten Carbide

葡萄糖是地球上最广泛的生物质资源之一,直接由葡萄糖出发制备乙二醇是一条替代化石能源制备乙二醇的绿色途径。本工作探索了Ni-W2C/AC催化剂下葡萄糖的加氢转化过程。研究结果表明;催化剂组成(2%～20%Ni)、反应温度(205～235℃)、反应压力(1～5 MPa)、底物浓度(1%～3%)均对产物分布有至关重要的影响。在最佳的反应条件下,乙二醇的收率可达到38%,六元醇收率可达到19%。另外,通过改变进料方式原位控制葡萄糖的动态浓度可将乙二醇的收率提高到60%。

Glucose is one of the most extensive biomass resources on earth.The direct preparation of glycol from glucose is an environment friendly approach to replace fossil energy to prepare ethylene glycol.This paper explored the hydroconversion process of glucose under Ni-W2C/AC catalyst.The results showed that the catalyst composition (2%~20% Ni),reaction temperature (205 ℃~235 ℃),reaction pressure (1~5 MPa) and substrate concentration (1%~3%) all had important influences on the product distribution.Under the optimal reaction conditions,the yield of ethylene glycol and hexaphenol could reach 38% and 19% respectively.In addition,the in-situ control of the dynamic concentration of glucose by changing the feed method increased the yield of ethylene glycol to 60%.