Journal
BIORESOURCE TECHNOLOGY
Volume 270, Issue -, Pages 537-544Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.083
Keywords
Bioenergy; Corn stover; Enzymatic saccharification; Ionic liquids; gamma-Valerolactone
Funding
- National Natural Science Foundation of China [NSFC 31270637]
- Science and Technology Department of Guizhou Province [[2016]1402, [2016]5652]
- Open Research Fund of Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China [08031339]
- Qilu University of Technology
- Excellent Scientific Innovative Talent Program from Education Department of Guizhou Province [KY [2015]479]
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The dissolution of corn stover was investigated in gamma-valerolactone (GVL) assisted by ionic liquids. An enhanced subsequent enzymatic saccharification was reached with a total reducing sugar yield of 0.69 g.g(-1) and a glucose of 0.38 g. g(-1) within 24 h. The treatment effects on the physical-chemical features of corn stover in terms of the natural recalcitrance to the subsequent biological digest were systematically investigated using composition analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The structures of the associated enzymatic hydrolysis lignin (EHL) and ionic liquid extracted lignin (IEL) were characterized by gel permeation chromatography (GPC), fourier transform infra-red spectroscopy (FTIR), phosphorous nuclear magnet resonance spectrometry (P-31 NMR), and heteronuclear single quantum coherence spectroscopy (HSQC) for an in-depth understanding of the delignification process and the basic structural information for further lignin valorization.
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