Hydrothermal upgrading of biomass to biofuel; studies on some monosaccharide model compounds
Hydrothermal upgrading of biomass to biofuel; studies on some monosaccharide model compounds
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DOI：
10.1016/j.carres.2004.04.018
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发表时间：
2004-07-12
影响因子：
3.1
通讯作者：
Peters, JA
中科院分区：
文献类型：
--
作者：
Srokol, Z;Bouche, AG;Peters, JA
在生物质水热升级过程中，水解为葡萄糖是一个重要步骤。为了阐明这种初始水解之后的一些反应途径，研究了水热处理（340℃，27.5 MPa, 25-204 s）稀释（50 mM） d -葡萄糖和其他一些单糖的溶液。在亚临界条件下，由于K-w的增加，酸催化和碱催化反应同时发生。酸催化反应主要是脱水反应，最初生成5-羟基甲基糠醛。重要的碱催化反应产生乙醇醛和甘油醛。进一步的破碎和脱水会产生各种低分子量化合物，如甲酸、乙酸、乳酸、丙烯酸、2-呋喃醛和1,2,4-苯三醇。导致液体反应产物o含量降低的重要途径始于中间的甘油醛，它形成丙酮醛，丙酮醛又转化为甲酸和乙醛。后一种化合物也可以通过甘油醛异构化成乳酸然后脱碳而形成。(C) 2004 Elsevier Ltd.版权所有。
During the hydrothermal upgrading of biomass, hydrolysis to glucose is an important step. To elucidate some of the reaction pathways that follow this initial hydrolysis, the hydrothermal treatment (340 degreesC, 27.5 MPa, 25-204 s) of dilute (50 mM) solutions Of D-glucose and some other monosaccharides were studied. As a result of the increase of K-w under subcritical conditions, both acid and base catalysed reactions occur. The acid catalysed reactions are mainly dehydrations leading initially to 5-hydroxy-methylfurfural. Important base catalysed reactions result in glycolaldehyde and glyceraldehyde. Further fragmentations and dehydrations lead to a variety of low molecular weight compounds such as formic acid, acetic acid, lactic acid, acrylic acid, 2-furaldehyde and 1,2,4-benzenetriol. Important pathways leading to a decrease of the O-content of the liquid reaction products start from the intermediate glyceraldehyde, which forms pyruvaldehyde, which in its turn is converted into formic acid and acetaldehyde. The latter compound can also be formed via isomerisation of glyceraldehyde into lactic acid followed by decarbonylation. (C) 2004 Elsevier Ltd. All rights reserved.