Aqueous amine enables sustainable monosaccharide, monophenol, and pyridine base coproduction in lignocellulosic biorefineries

被引:24
作者
Xu, Li [1 ]
Cao, Meifang [1 ]
Zhou, Jiefeng [1 ]
Pang, Yuxia [1 ]
Li, Zhixian [1 ]
Yang, Dongjie [1 ]
Leu, Shao-Yuan [2 ]
Lou, Hongming [1 ]
Pan, Xuejun [3 ]
Qiu, Xueqing [4 ]
机构
[1] South China Univ Technol, Sch Chem & Chem Engn, State Key Lab Pulp & Paper Engn, Guangdong Prov Key Lab Green Chem Prod Technol, Guangzhou 510641, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
[3] Univ Wisconsin, Dept Biol Syst Engn, Madison, WI 53706 USA
[4] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China
基金
中国国家自然科学基金;
关键词
LIGNIN CONVERSION; BIOMASS; DEPOLYMERIZATION; FRACTIONATION; PRETREATMENT; ACID; CHEMICALS; MONOMERS; ENERGY;
D O I
10.1038/s41467-024-45073-w
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Thought-out utilization of entire lignocellulose is of great importance to achieving sustainable and cost-effective biorefineries. However, there is a trade-off between efficient carbohydrate utilization and lignin-to-chemical conversion yield. Here, we fractionate corn stover into a carbohydrate fraction with high enzymatic digestibility and reactive lignin with satisfactory catalytic depolymerization activity using a mild high-solid process with aqueous diethylamine (DEA). During the fractionation, in situ amination of lignin achieves extensive delignification, effective lignin stabilization, and dramatically reduced nonproductive adsorption of cellulase on the substrate. Furthermore, by designing a tandem fractionation-hydrogenolysis strategy, the dissolved lignin is depolymerized and aminated simultaneously to co-produce monophenolics and pyridine bases. The process represents the viable scheme of transforming real lignin into pyridine bases in high yield, resulting from the reactions between cleaved lignin side chains and amines. This work opens a promising approach to the efficient valorization of lignocellulose. Utilization of the entire lignocellulose is essential for sustainable and cost-effective biorefineries, but it is hindered by a trade-off between efficient carbohydrate utilization and lignin-to-chemical conversion yield. Here, the authors report a mild lignocellulosic fractionation process using aqueous diethylamine which produces a carbohydrate fraction susceptible to enzymatic hydrolysis and a high-quality lignin that delivers high monomer yields upon catalytic amination and depolymerization.
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页数:12
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