Effect of ionic liquid pretreatment on the chemical composition, structure and enzymatic hydrolysis of energy cane bagasse

被引：196

作者：

Qiu, Zenghui ^{[1
]}

Aita, Giovanna M. ^{[1
]}

Walker, Michelle S. ^{[1
]}

机构：

[1] Louisiana State Univ, Ctr Agr, Audubon Sugar Inst, St Gabriel, LA 70776 USA

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 117卷

关键词：

Ionic liquid; Pretreatment; Lignocelluloses; Energy cane; Enzymatic hydrolysis; CELLULOSE; BIOMASS; RECALCITRANCE; REGISTRATION; DISSOLUTION; KEY;

D O I：

10.1016/j.biortech.2012.04.070

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Ionic liquids (ILs) are promising solvents for the pretreatment of lignocellulose as they are thermally stable, environmentally friendly, recyclable, and have low volatility. This study evaluated the effect of 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]) for the pretreatment of energy cane bagasse in terms of biomass composition, structural changes and enzymatic digestibility. Energy cane bagasse was pretreated with [EMIM][OAc] (5% (w/w)) at 120 degrees C for 30 min followed by hydrolysis with commercially available enzymes, Spezyme CP and Novozyme 188. IL-treated energy cane bagasse resulted in significant lignin removal (32.0%) with slight glucan and xylan losses (8.8% and 14.0%, respectively), and exhibited a much higher enzymatic digestibility (87.0% and 64.3%) than untreated (5.5% and 2.8%) or water-treated (4.0% and 2.1%) energy cane bagasse in terms of both cellulose and hemicellulose digestibilities, respectively. The enhanced digestibilities of IL-treated biomass can be attributed to delignification and reduction of cellulose crystallinity as confirmed by FTIR and XRD analyses. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：251 / 256

页数：6

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