Structural Characterization of Switchgrass Lignin after Ethanol Organosolv Pretreatment

被引：123

作者：

Hu, Gang ^{[1
]}

Cateto, Carolina ^{[1
]}

Pu, Yunqiao ^{[1
]}

Samuel, Reichel ^{[1
]}

Ragauskas, Arthur J. ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biochem, Inst Paper Sci & Technol, Atlanta, GA 30332 USA

来源：

ENERGY & FUELS | 2012年 / 26卷 / 01期

关键词：

AMMONIA RECYCLED PERCOLATION; KLUYVEROMYCES-MARXIANUS IMB4; ENZYMATIC-HYDROLYSIS; SIMULTANEOUS SACCHARIFICATION; LIME PRETREATMENT; CORN STOVER; BIOMASS; DIGESTIBILITY; DELIGNIFICATION; FERMENTATION;

D O I：

10.1021/ef201477p

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Kanlow switchgrass was subjected to aqueous ethanol organosolv pretreatment, and ethanol organosolv lignin (EOL) was recovered through precipitation of pretreatment effluents. Ball-milled switchgrass lignin was also isolated from unpretreated and pretreated switchgrass. The obtained switchgrass lignins were characterized using Fourier transform infrared (FTIR) spectroscopy, P-31 nuclear magnetic resonance (NMR), two-dimensional (2D) heteronuclear single-quantum coherence (HSQC) NMR spectroscopy, and gel permeation chromatography (GPC). The results showed that the molecular weight of switchgrass EOL lignin decreased while polydispersity increased. The pretreatment resulted in an increase of free phenolic guaiacyl and syringyl units and a decrease of the beta-O-4 linkage content.

引用

页码：740 / 745

页数：6

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