Journal
BIORESOURCE TECHNOLOGY
Volume 142, Issue -, Pages 198-208Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.05.032
Keywords
Ionic liquid; Lignocellulose; Pre-treatment; Fractionation; Cellulose; Hemicellulose; Lignin
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) [SFRH/BPD/26356/2006, PEst-C/EQB/LA0006/2011]
- European Commission [251151]
- Brazilian National Council of Scientific and Technological Development (CNPq) [551457/2010-4]
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This work is devoted to study pre-treatment methodologies of wheat straw with 1-ethyl-3-methylimidazolium acetate ([emim][CH3COO]) and subsequent fractionation to cellulose, hemicellulose and lignin. The method developed and described here allows the separatiou into high purity carbohydrate and lignin fractions and permits an efficient IL recovery. A versatility of the established method was confirmed by the IL reuse. The fractionation of completely dissolved biomass led to cellulose-rich and hemicellulose-rich fractions. A high purity lignin was also achieved. To verify the potential further applicability of the obtained carbohydrate-rich fractions, and to evaluate the pre-treatment efficiency, the cellulose fraction resulting from the treatment with [emim][CH3COO] was subjected to enzymatic hydrolysis. Results showed a very high digestibility of the cellulose samples and confirmed a high glucose yield for the optimized pre-treatment methodology. (C) 2013 Elsevier Ltd. All rights reserved.
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