title: Fractional pretreatment of hybrid poplar for accelerated enzymatic hydrolysis: characterization of cellulose-enriched fraction.
abstract: The efficient production of fermentable sugars is a prerequisite for economic ethanol production from lignocellulosic biomass. A cellulose-enriched fraction was obtained by complete dissolution of ball-milled hybrid poplar wood in dimethyl sulfoxide and lithium chloride (DMSO/LiCl). The cellulose-enriched fraction was mainly composed of glucose and xylose. Spectral fitting analysis of CP/MAS (13)C NMR revealed that the cellulose-enriched fraction had para-crystalline structures with somewhat larger contents of crystalline cellulose І(β) than І(α). The cellulose-enriched fraction was much easier to be converted into mono sugars by cellulases than the untreated sample. Scanning electron microscopy (SEM) indicated that the cellulose-enriched fraction was porous, which could likely explain the high enzymatic hydrolysis efficiency. This study provides a novel pretreatment method based on fractional separation of the three biopolymers via complete dissolution system for enhancement of conversion from ignocellulose to biofuels.
authors.affiliation: Institute of Biomass Chemistry and Technology, Beijing Forestry University, Beijing, China.
authors.forename: Ling Yan
authors.initials: LY
authors.lastname: Meng
authors.forename: Su Min
authors.initials: SM
authors.lastname: Kang
authors.forename: Xue Ming
authors.initials: XM
authors.lastname: Zhang
authors.forename: Yu Ying
authors.initials: YY
authors.lastname: Wu
authors.forename: Feng
authors.initials: F
authors.lastname: Xu
authors.forename: Run Cang
authors.initials: RC
authors.lastname: Sun
mesh_terms: D018533:Biomass; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D032107:Populus