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Hydrothermal Reactions of Biomass-Derived Platform Molecules: Distinct Effect of Aprotic and Protic Solvents on Primary Decomposition of Glucose and Fructose in Hot-Compressed Solvent/Water Mixtures
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-25 , DOI: 10.1021/acs.iecr.0c01514 Bing Song 1 , Zhiliang Wu 1 , Yun Yu 1 , Hongwei Wu 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-25 , DOI: 10.1021/acs.iecr.0c01514 Bing Song 1 , Zhiliang Wu 1 , Yun Yu 1 , Hongwei Wu 1
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The study compares the effects of aprotic (i.e., gamma-valerolactone, acetone, and 1,4-dioxane) and protic (i.e., methanol and ethanol) solvents on the primary decomposition reactions of glucose and fructose, which are key biomass-derived platform molecules, in hot-compressed solvent/water mixtures (10 vol %) at various temperatures. Aprotic solvents enhance dehydration reactions and suppress isomerization reactions during glucose and fructose decomposition. Particularly, 5-hydroxymethyl-furfural (5-HMF) that is a secondary product for both glucose and fructose decomposition in protic solvent/water mixtures becomes a primary product for their decomposition in aprotic solvent/water mixtures, contributing to ∼25–27% and ∼19–22% of the primary decomposition reactions for glucose and fructose, respectively. In contrast, the protic solvent has little effect on the primary decomposition of sugars in hot-compressed solvent/water mixtures. The addition of the aprotic solvent reduces the activation energy of sugar decomposition in the solvent/water mixture, but the reaction rate constant in the aprotic solvent/water mixture is still lower than that in the protic solvent/water mixture.
中文翻译：
生物质衍生的平台分子的水热反应：非质子和质子溶剂对热压溶剂/水混合物中葡萄糖和果糖的初级分解的不同影响
该研究比较了非质子溶剂（即γ-戊内酯，丙酮和1,4-二恶烷）和质子溶剂（即甲醇和乙醇）对葡萄糖和果糖的初级分解反应的影响，葡萄糖和果糖是生物质衍生的重要平台在各种温度下热压缩的溶剂/水混合物（10体积％）中的分子。非质子传递溶剂在葡萄糖和果糖分解过程中会增强脱水反应并抑制异构化反应。特别是，5-羟甲基糠醛（5-HMF）是质子溶剂/水混合物中葡萄糖和果糖分解的副产物，成为它们在质子溶剂/水混合物中分解的主要产物，占〜25–27％葡萄糖和果糖的主要分解反应分别占19％和约22％。相反，质子溶剂对热压缩的溶剂/水混合物中糖的初次分解影响很小。非质子溶剂的添加降低了溶剂/水混合物中糖分解的活化能，但是非质子溶剂/水混合物中的反应速率常数仍然低于质子溶剂/水混合物中的反应速率常数。
更新日期：2020-04-24
中文翻译：
生物质衍生的平台分子的水热反应：非质子和质子溶剂对热压溶剂/水混合物中葡萄糖和果糖的初级分解的不同影响
该研究比较了非质子溶剂（即γ-戊内酯，丙酮和1,4-二恶烷）和质子溶剂（即甲醇和乙醇）对葡萄糖和果糖的初级分解反应的影响，葡萄糖和果糖是生物质衍生的重要平台在各种温度下热压缩的溶剂/水混合物（10体积％）中的分子。非质子传递溶剂在葡萄糖和果糖分解过程中会增强脱水反应并抑制异构化反应。特别是，5-羟甲基糠醛（5-HMF）是质子溶剂/水混合物中葡萄糖和果糖分解的副产物，成为它们在质子溶剂/水混合物中分解的主要产物，占〜25–27％葡萄糖和果糖的主要分解反应分别占19％和约22％。相反，质子溶剂对热压缩的溶剂/水混合物中糖的初次分解影响很小。非质子溶剂的添加降低了溶剂/水混合物中糖分解的活化能，但是非质子溶剂/水混合物中的反应速率常数仍然低于质子溶剂/水混合物中的反应速率常数。
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