Journal
BIORESOURCE TECHNOLOGY
Volume 232, Issue -, Pages 222-228Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.02.041
Keywords
Corn stover; Enzymatic hydrolysis; Lignin; Organic amine; Organosolv pretreatment
Funding
- Program for The National Natural Science Foundation of China [21406110]
- Jiangsu Province Natural Science Foundation for Youths [BK20140938]
- Changjiang Scholars and Innovative Research Team in University [IRT_14R28]
- Major Research Plan of the National Natural Science Foundation of China [21390204]
- State Key Laboratory of Motor Vehicle Biofuel Technology [KFKT2013001]
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
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A novel and efficient organic amine and organosolv synergetic pretreatment method was developed to overcome the recalcitrance of lignocellulose to produce fermentable sugars and high-quality salt-free lignin. After optimization of the process parameters, a delignification of 81.7% and total sugar yield of 83.2% (87.1% glucose, 75.4% xylose) could be obtained using n-propylamine (10 mmol/g, biomass) as a catalyst and aqueous ethanol (60%, v/v) as a solvent. The susceptibility of the substrates to enzymatic digestibility was explained by their physical and chemical characteristics. The physical structure of extracted lignin showed higher beta-aryl ether bonds content and functionalities, offering the potential for further downstream upgrading. The role of organic amine catalyst and a synergistic mechanism is proposed for the present system. (C) 2017 Elsevier Ltd. All rights reserved.
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