关键词:

高温液态水, 葡萄糖, 5-羟甲基糠醛, 乙酰丙酸, 氯化铜, 分解反应动力学

Abstract:

The decomposition kinetics of glucose and 5-hydroxymethylfurfural catalyzed by copper chloride were measured in small volume high^-pressure vessel batch reactors, at various temperatures from 423.15 K to 463.15 K and catalyst concentration from 0 to 0.08 mol·L^-1.The results showed that their conversion went up with the increase of reaction temperature and catalyst concentration, resulting in higher yield of levulinic acid.By comparing the correlation coefficients, it was confirmed that both glucose and 5-hydroxymethylfurfural decomposition are first order reaction.By using first order kinetics equation, the activation energies of desired and undesired reaction were estimated, 134.65 kJ·mol^-1 and 144.1 kJ·mol^-1 for glucose decomposition，131.97 kJ·mol^-1 and 135.18 kJ·mol^-1 for 5-hydroxymethylfurfural decomposition, respectively.This work would provide important basic data not only for the exploration of reaction mechanism of glucose decomposition, but also for the development of high activity and high selectivity catalyst.

Key words:

高温液态水, 葡萄糖, 5-羟甲基糠醛, 乙酰丙酸, 氯化铜, 分解反应动力学