A kinetic study on the conversion of glucose to levulinic acid
A kinetic study on the conversion of glucose to levulinic acid
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DOI：
10.1205/cherd05038
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发表时间：
2006-05-01
影响因子：
3.9
通讯作者：
Heeres, H. J.
中科院分区：
文献类型：
--
作者：
Girisuta, B.;Janssen, L. P. B. M.;Heeres, H. J.
乙酰丙酸被认为是一种很有前途的绿色化合物。生物质衍生平台化学品。对生物质转化为乙酰丙酸的关键步骤之一，即，已经进行了葡萄糖到乙酰丙酸的酸催化分解。实验在宽的温度窗口（140-200摄氏度）中进行，使用硫酸作为催化剂（0.05-1 M），初始葡萄糖浓度为0.1 - 1 M。采用幂律方法建立了反应序列的动力学模型，包括中间体5-羟甲基-2-糠醛（HMF）和胡敏素副产物的动力学。在稀葡萄糖溶液中，高酸浓度有利于乙酰丙酸的产率。在动力学结果的基础上，优选具有高度返混的连续反应器配置以实现高乙酰丙酸产率。
Levulinic acid has been identified as a promising green. biomass derived platform chemical. A kinetic study oil one of the key steps in the conversion of biomass to levulinic acid, i.e., the acid catalysed decomposition of glucose to levulinic acid has been performed. The experiments were Performed in a broad temperature window (140-200 degrees C), using sulphuric acid as the catalyst (0.05-1 M) and a initial glucose concentration between 0.1 and 1 M. A kinetic model of the reaction sequence was developed including the kinetics for the intermediate 5-hydroxymethyl-2-furaldehyde (HMF) and humins byproducts using a power-law approach. The yield of levulinic acid is favoured in dilute glucose solution at high acid concentration. On the basis of the kinetic results, continuous reactor configurations with a high extent of back-mixing are preferred to achieve high levulinic acid yields.