在熔融盐-有机溶剂两相体系中一步转化玉米秸秆为葡萄糖和糠醛。
One-step conversion of corn stalk to glucose and furfural in molten salt hydrate/organic solvent biphasic system.
机构信息
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China; MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
出版信息
Bioresour Technol. 2023 Oct;386:129520. doi: 10.1016/j.biortech.2023.129520. Epub 2023 Jul 17.
An effective approach for glucose and furfural production by converting cellulose and hemicelluloses from corn stalk in a biphasic system of molten salt hydrate (MSH) and organic solvent using HSO as catalyst was reported. Results showed that the system with LiBr·3HO and dichloromethane (DCM) had excellent performance in cellulose and hemicelluloses conversion. Under the optimal reaction conditions (corn stalk:LiBr·3HO:DCM ratio = 0.35:10:20 g/mL/mL, 0.05 mol/L HSO, 120 °C, 90 min), 58.9% glucose and 72.5% furfural were yielded. Meanwhile, lignin was obviously depolymerized by the cleavage of β-O-4' linkages and fractionated with high purity and low molecular weight for potential coproducts. Fluorescence microscopy and confocal Raman microscope displayed that the LiBr·3HO/DCM treatment caused decreasing intensities in carbohydrate and lignin, suggesting the degradation of the main components of biomass. This research provided a promising biorefinery technology for the comprehensive utilization of corn stalk.
一种在熔融盐水（MSH）和有机溶剂的两相体系中，以 HSO 为催化剂，从玉米秸秆中的纤维素和半纤维素转化为葡萄糖和糠醛的有效方法。结果表明，LiBr·3HO 和二氯甲烷（DCM）的体系在纤维素和半纤维素转化方面表现出优异的性能。在最佳反应条件下（玉米秸秆：LiBr·3HO:DCM 比例=0.35:10:20 g/mL/mL，0.05 mol/L HSO，120°C，90 min），可得到 58.9%的葡萄糖和 72.5%的糠醛。同时，木质素通过β-O-4'键的断裂明显解聚，并分馏得到高纯度和低分子量的潜在联产物。荧光显微镜和共焦拉曼显微镜显示，LiBr·3HO/DCM 处理导致碳水化合物和木质素的强度降低，表明生物质的主要成分发生了降解。该研究为玉米秸秆的综合利用提供了一种有前景的生物炼制技术。
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