生物质溶剂和质子离子液体作为木质素选择性预处理剂在杨树分馏中的应用研究

IF 1.7 4区 农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD Journal of Wood Chemistry and Technology Pub Date : 2022-02-01 DOI:10.1080/02773813.2022.2033781
Nazife Isik Haykir
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引用次数: 5

摘要

在本研究中,质子离子液体(pil)和生物质衍生溶剂的混合物;采用不同质量百分比的-戊内酯(GVL)、乙酰丙酸(LA)和水对杨树进行预处理。添加GVL可使MEAHSO4-GVL-H2O处理的生物质脱木质素作用提高60%;生物质纤维素含量由42%提高到74%,木质素去除率为67%。首次使用LA水溶液预处理生物质的效果优于TEAHSO4-H2O。在80% ~ 20%的LA-H2O浓度下,木质素的提取率为70%,结构中保留了89%的纤维素。SEM、FTIR和XRD分析表明,纤维素大纤维清晰,木质素信号强度较低,生物质结晶度较高。因此,在10%底物负荷下,LA预处理的杨树酶转化释放43 g/L葡萄糖。研究结果表明,生物质衍生溶剂、GVL、LA和PILs及其水溶液混合物具有选择性解构杨树的潜力。
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Evaluation of biomass-derived solvents and protic ionic liquids as lignin-selective pretreatment agents for poplar fractionation
Abstract In this study, mixtures of protic ionic liquids (PILs) and biomass derived solvents; gamma-valerolactone (GVL), levulinic acid (LA) and H2O at different weight percentages were used to pretreat poplar. GVL addition up to 60% enhanced delignification in biomass that is subjected to MEAHSO4-GVL-H2O; cellulose content of the biomass increased from 42% to 74% with 67% lignin removal. Aqueous solution of LA used for the first time to pretreat a biomass performed better than TEAHSO4-H2O. LA-H2O at 80%-20% resulted in 70% lignin extraction and preserved 89% of the cellulose in the structure which were also verified with SEM, FTIR and XRD analysis displaying clear cellulose macrofibers, lignin signals with lower intensities and higher biomass crystallinity, respectively. Accordingly, enzymatic conversion of LA pretreated poplar released 43 g/L glucose at 10% substrate loading. Findings showed the potentials of biomass derived solvents, GVL and LA and PILs and their aqueous mixtures to selectively deconstruct poplar.
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来源期刊
Journal of Wood Chemistry and Technology
Journal of Wood Chemistry and Technology 工程技术-材料科学:纸与木材
CiteScore
3.70
自引率
20.00%
发文量
37
审稿时长
3 months
期刊介绍: The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization. JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.
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