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首页> 外文期刊>Journal of industrial and engineering chemistry >Structural features of lignin-rich solid residues obtained from two-step acid-hydrolysis of Miscanthus biomass (Miscanthus sacchariflorus Benth.)
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Structural features of lignin-rich solid residues obtained from two-step acid-hydrolysis of Miscanthus biomass (Miscanthus sacchariflorus Benth.)

机译：从芒草生物质两步酸水解中获得的富含木质素的固体残渣的结构特征（Miscanthus sacchariflorus Benth。）

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Miscanthus was subjected to two-step hydrolysis under different concentrations of sulfuric-acid (first-step: 72-18%; second-step: 36-2%) for conversion to monomeric sugars and lignin-rich solid residues. Compared to native lignin isolated from Miscanthus, there were obvious reductions of phenolic hydroxyl(0.5-2.6% vs. 5.9%) and methoxyl groups(3.0-13.9% vs. 16.5%) in solid residues. TGA confirmed that thermal stability of solid residues was proportional to greater abundance of condensed lignin structures and inversely proportional to remaining carbohydrate amount. Py-GC/MS revealed that sum of lignin derivatives (H-,G-,S-type phenols) amounted to 23-76% of the levels of MWL, meaning that lignins in solid residues seem to be highly condensed. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：将芒草在不同浓度的硫酸下进行两步水解（第一步：72-18％;第二步：36-2％），以转化为单体糖和富含木质素的固体残留物。与从芒草中分离出的天然木质素相比，固体残留物中的酚羟基（0.5-2.6％比5.9％）和甲氧基（3.0-13.9％比16.5％）明显减少。 TGA证实，固体残留物的热稳定性与浓缩的木质素结构的丰度成正比，与剩余碳水化合物的含量成反比。 Py-GC / MS表明，木质素衍生物（H，G，S型酚）的总和为MWL的23-76％，这意味着固体残渣中的木质素似乎高度浓缩。 （C）2015韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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