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首页> 外文期刊>Journal of industrial and engineering chemistry >Applicability of sub- and supercritical water hydrolysis of woody biomass to produce monomeric sugars for cellulosic bioethanol fermentation
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Applicability of sub- and supercritical water hydrolysis of woody biomass to produce monomeric sugars for cellulosic bioethanol fermentation

机译：亚临界和超临界水水解木质生物质用于生产纤维素生物乙醇发酵用单体糖的适用性

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摘要

In this study two woody biomasses, poplar and pitch pine wood, were treated with sub- and supercritical water (SCW) at temperature of 325-425 °C, at pressure of 220± 10 atm and residence time of 60 s, respectively, to develop a time saving and efficient conversion process for the production of fermentable sugars from woody biomasses using supercritical water system. Cellulose/hemicellulose was easily hydrolyzed during SCW treatment into monomeric sugars with the total yield of 7.3% and 8.2% based on the oven dried weight of poplar and pitch pine, respectively. Total yield of the monomeric sugars was increased about threefolds to 23.0% and 25.1% in the presence of 0.05% of hydrochloric acid. Model experiment confirmed that glucose and xylose were readily converted into low molecular weight compounds during SCW hydrolysis. According to GC/MS analysis main compounds converted from glucose and xylose by SCW were identified to 5-hydroxymethyl furfural and 4-oxo-5-methoxy-2-penten-5-olide, respectively.
机译：在这项研究中，分别在325-425°C，220±10 atm的压力和60 s的停留时间下，分别用亚临界水和超临界水（SCW）处理了两种木质生物量，即杨木和沥青松木。开发使用超临界水系统从木质生物质生产可发酵糖的省时高效转换工艺。在SCW处理期间，纤维素/半纤维素容易水解成单体糖，基于杨木和沥青松木的烘干重量，总收率分别为7.3％和8.2％。在0.05％的盐酸存在下，单体糖的总产率增加了约三倍，达到23.0％和25.1％。模型实验证实，在SCW水解过程中，葡萄糖和木糖很容易转化为低分子量化合物。根据GC / MS分析，将通过SCW转化为葡萄糖和木糖的主要化合物分别鉴定为5-羟甲基糠醛和4-氧代-5-甲氧基-2-戊烯-5-内酯。

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