期刊
BIOTECHNOLOGY AND BIOENGINEERING
卷 102, 期 5, 页码 1368-1376出版社
WILEY
DOI: 10.1002/bit.22179
关键词
cellulose crystallinity; delignification; enzymatic digestibility; ionic liquid; lignocellulose
资金
- Korean Government (MOEHRD) [KRF-2007-357-D00058]
- Hartley Foundation
- Rensselaer Nanotechnology Center
Lignocellulose represents a key sustainable source of biomass for transformation into biofuels and bio-based products. Unfortunately, lignocellulosic biomass is highly recalcitrant to biotransformation, both microbial and enzymatic, which limits its use and prevents economically viable conversion into value-added products. As a result, effective pretreatment strategies are necessary, which invariably involves high energy processing or results in the degradation of key components of lignocellulose. In this work, the ionic liquid, 1-ethyl-3-methylimidazolium acetate ([Emim][CH3COO]), was used as a pretreatment solvent to extract lignin from wood flour. The cellulose in the pretreated wood flour becomes far less crystalline without undergoing solubilization. When 40% of the lignin was removed, the cellulose crystallinity index dropped below 45, resulting in >90% of the cellulose in wood flour to be hydrolyzed by Trichoderma viride cellulase. [Emim] [CH3COO] was easily reused, thereby resulting in a highly concentrated solution of chemically unmodified lignin, which may serve as a valuable source of a polyaromatic material as a value-added product.
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