Effects of γ-Valerolactone/H2O Solvent on the Degradation of pubescens for Its Fullest Utilization,Journal of Agricultural and Food Chemistry

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Effects of γ-Valerolactone/H2O Solvent on the Degradation of pubescens for Its Fullest Utilization
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-05-25 00:00:00 , DOI: 10.1021/acs.jafc.8b01563
Yiping Luo _{1,

2} , Zheng Li ₁ , Yini Zuo ₁ , Zhishan Su ₁ , Changwei Hu ₁

Affiliation

Solvent-thermal conversion of biomass was promising for obtaining value-added chemicals. However, little was known about the interactions between solvents and biomass in the process, which hindered the effective utilization of biomass. The effects of γ-valerolactone (GVL) and H₂O on enhancing pubescens degradation via the cleavage of inter- and intramolecular linkages were studied. At 160 °C, H₂O selectively promoted the cleavage of the intermolecular linkages by forming hydrogen bonds, making mainly contributions to hemicellulose dissolution, while GVL and H₂O promoted lignin dissolution by forming hydrogen bonds with −OCH₃ group of lignin. H₂O promoted the cleavage of β-(1,4)-glycosidic bonds in hemicellulose derived oligomers to xylose, while the oxygen in the ring of GVL might interact with hydroxyl groups of xylose unit to enhance the dehydration of xylose to furfural, whereas GVL with H₂O promoted the depolymerization of lignin to oligomers mainly including β-O-4′ and β–β′ linkages connecting to G and S units.

中文翻译：

γ-戊内酯/ H ₂ O溶剂对毛竹降解的充分利用效果

生物质的溶剂热转化有望获得增值化学品。然而，对于该过程中溶剂与生物质之间的相互作用知之甚少，这阻碍了生物质的有效利用。研究了γ-戊内酯（GVL）和H ₂ O通过分子间和分子间键断裂促进毛胚降解的作用。在160°C时，H ₂ O通过形成氢键选择性地促进分子间键的裂解，主要是对半纤维素的溶解做出贡献，而GVL和H ₂ O通过与木质素的-OCH ₃基团形成氢键来促进木质素的溶解。高₂O促进半纤维素衍生的低聚物中的β-（1,4）-糖苷键裂解为木糖，而GVL环中的氧可能与木糖单元的羟基相互作用以增强木糖脱水成糠醛，而GVL则与H ₂ O促进木质素解聚为低聚物，主要包括连接G和S单元的β-O-4'和β-β'键。

更新日期：2018-05-25

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