Alkaline hydrogen peroxide pretreatment of softwood: Hemicellulose degradation pathways

被引：78

作者：

Alvarez-Vasco, Carlos ^{[1
]}

Zhang, Xiao ^{[1
]}

机构：

[1] Washington State Univ, Bioprod Sci & Engn Lab, Voiland Sch Chem Engn & Bioengn, Richland, WA 99354 USA

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 150卷

关键词：

Alkaline hydrogen peroxide; Softwood; Glucomannan; Carboxylic acids; Endwise depolymerization; ENZYMATIC-HYDROLYSIS; CORN STOVER; LIGNOCELLULOSIC BIOMASS; AQUEOUS-SOLUTIONS; D-GLUCOSE; FERMENTATION; ACID; WATER; TECHNOLOGIES; INHIBITORS;

D O I：

10.1016/j.biortech.2013.10.020

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study investigated softwood hemicelluloses degradation pathways during alkaline hydrogen peroxide (AHP) pretreatment of Douglas fir. It was found that glucomannan is much more susceptible to alkaline pretreatment than xylan. Organic acids, including lactic, succinic, glycolic and formic acid are the predominant products from glucomannan degradation. At low treatment temperature (90 degrees C), a small amount of formic acid is produced from glucomannan, whereas glucomannan degradation to lactic acid and succinic acid becomes the main reactions at 140 degrees C and 180 degrees C. The addition of H2O2 during alkaline pretreatment of D. fir led to a significant removal of lignin, which subsequently facilitated glucomannan solubilization. However, H2O2 has little direct effect on the glucomannan degradation reaction. The main degradation pathways involved in glucomannan conversion to organics acids are elucidated. The results from this study demonstrate the potential to optimize pretreatment conditions to maximize the value of biomass hemicellulose. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：321 / 327

页数：7

共 34 条

[1]

[Anonymous], 1984, WOOD CHEM ULTRASTRUC, DOI DOI 10.1515/9783110839654

[2]

[Anonymous], 2008, NATL RENEW ENERGY LA

[3]

[Anonymous], 2008, LAB ANAL PROCEDURE L

[4] KINETIC-STUDIES OF THE REACTIONS OF KETOSES AND ALDOSES IN WATER AT HIGH-TEMPERATURE .1. MECHANISM OF FORMATION OF 5-(HYDROXYMETHYL)-2-FURALDEHYDE FROM D-FRUCTOSE AND SUCROSE [J].