Pretreatment of wheat straw using SO2 dissolved in hot water
Pretreatment of wheat straw using SO2 dissolved in hot water
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使用溶解在热水中的 SO2 预处理麦秆
DOI：
10.1016/j.biortech.2012.08.028
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发表时间：
2012-11-01
影响因子：
11.4
通讯作者：
Wang, Wenhua
中科院分区：
文献类型：
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作者：
Liu, Weina;Hou, Yucui;Wang, Wenhua
有效的预处理对于木质纤维素材料的完全酶促转化是重要的。以小麦秸秆中木质纤维素质量为基准，用二氧化硫（SO2）溶解于热水中对小麦秸秆进行预处理，木糖和总产物产率分别可达61.1%和93.9%。半纤维素转化和木糖脱水的表观活化能分别为7.8和9.0 kl/mol。红外光谱分析表明，处理后的半纤维素组分发生了转化，纤维素中的氢键发生了断裂，但木质素结构没有发生变化。重要的是，通过蒸汽汽提从产物混合物中回收SO2，并且可以重复使用。因此，SO2-H2O体系是一种高效、环境友好的将麦草中的半纤维素转化为木糖、葡萄糖和阿拉伯糖等单糖的方法。(C)2012爱思唯尔有限公司保留所有权利。
Efficient pretreatment is important for complete enzymatic conversion of lignocellulosic materials. Pretreatment of wheat straw with sulfur dioxide (SO2) dissolved in hot water achieved xylose and total product yields of up to 61.1% and 93.9%, respectively, based on the mass of lignocellulose in wheat straw. The apparent activation energies for hemicellulose conversion and xylose dehydration were 7.8 and 9.0 kl/mol. FT-IR spectra of the residual solid after treatment showed that the hemicellulosic components were converted, the hydrogen bonds in cellulose were broken, but the lignin structure was not changed. Importantly, the SO2 was recovered from the product mixture by steam stripping and could be reused. Thus, the SO2-H2O system is an efficient and environmentally friendly way for the conversion of hemicellulose in wheat straw into monosaccharides, such as xylose, glucose and arabinose. (C) 2012 Elsevier Ltd. All rights reserved.