Mingda Zhu, Xuejiao Qiu, Jingyun Hao, Jian-dong Hu, Zhanying Liu
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引用次数: 0
摘要
深共晶溶剂具有优异的物理和化学性质,尤其是其中一些溶剂溶解生物质的能力,因此可广泛应用于生物质预处理。在这项研究中,燕麦秸秆用氯化胆碱和一种酸(甲酸、乳酸或草酸)组成的深共晶溶剂进行预处理。甲酸/氯化胆碱混合物的还原糖产量最高。预处理温度为 110 °C,反应时间为 2 小时,固液比为 1:20,纤维素酶水解得到的还原糖产量为 23.5%,纤维素降解率达到 76.9%,半纤维素完全降解。然后对预处理后的燕麦秸秆进行了扫描电子显微镜、傅立叶变换红外光谱和 X 射线衍射分析。与未处理的样品相比,测定了其结晶度和木质素含量的变化。初步揭示了甲酸/氯化胆碱预处理燕麦秸秆的机理。这项研究可为扩大其在生物化学或生物饲料工艺中的应用提供机会。
Unlocking the potential of oat straw: Efficient pretreatment methods for enhanced glucose production
The excellent physical and chemical properties of deep eutectic solvents, especially the ability of some of them to dissolve biomass, make them broadly applicable in biomass pretreatment. In this study, oat straw was pretreated with deep eutectic solvents composed of choline chloride and an acid (formic, lactic, or oxalic acid). The highest reducing sugar yield was obtained for the formic acid/choline chloride mixture. Using a pretreatment temperature of 110 °C, a reaction time of 2 h, and a solid-liquid ratio of 1:20, the reducing sugar yield obtained by cellulase hydrolysis was 23.5%, the degradation rate of cellulose reached 76.9%, and hemicellulose was completely degraded. The pretreated oat straw was then analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The changes in its crystallinity and lignin content compared to the untreated specimen were determined. A preliminary mechanism for the pretreatment of oat straw with formic acid/choline chloride was revealed. The study could provide an opportunity to expand the application in biochemicals or biological feed processes.
期刊介绍:
The purpose of BioResources is to promote scientific discourse and to foster scientific developments related to sustainable manufacture involving lignocellulosic or woody biomass resources, including wood and agricultural residues. BioResources will focus on advances in science and technology. Emphasis will be placed on bioproducts, bioenergy, papermaking technology, wood products, new manufacturing materials, composite structures, and chemicals derived from lignocellulosic biomass.