乙酰丙酸
马来酸
化学
甲酸
水解
脱水
果糖
有机化学
催化作用
选择性
异构化
生物化学
共聚物
聚合物
作者
Ximing Zhang,Barron Hewetson,Nathan S. Mosier
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2015-03-13
卷期号:29 (4): 2387-2393
被引量:74
摘要
We report the positive effect of maleic acid, a dicarboxylic acid, on the selectivity of hexose dehydration to 5-hydroxymethyfurfural (HMF) and subsequent hydrolysis to levulinic and formic acids. We also describe the kinetic analysis of a Lewis acid (AlCl3) alone and in combination with HCl or maleic acid to catalyze the isomerization of glucose to fructose, dehydration of fructose to HMF, hydration of HMF to levulinic and formic acids, and degradation of these compounds to humins. The results show that AlCl3 significantly enhances the rate of glucose conversion to HMF and levulinic acid in the presence of both maleic acid and HCl. In addition, the degradation of HMF to humins, rather than levulinic and formic acids, is reduced by 50% in the presence of maleic acid and AlCl3 compared to HCl combined with AlCl3. The results suggest different reaction mechanisms for the dehydration of glucose and rehydration of HMF between maleic acid and HCl.
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