Effects of dilute acid pretreatment conditions on enzymatic hydrolysis monomer and oligomer sugar yields for aspen, balsam, and switchgrass

被引：82

作者：

Jensen, Jill R. ^{[1
]}

Morinelly, Juan E. ^{[1
]}

Gossen, Kelsey R. ^{[1
]}

Brodeur-Campbell, Michael J. ^{[1
]}

Shonnard, David R. ^{[1
,2
]}

机构：

[1] Michigan Technol Univ, Dept Chem Engn, Biochem Engn Lab, Houghton, MI 49931 USA

[2] Michigan Technol Univ, Sustainable Futures Inst, Houghton, MI 49931 USA

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 07期

基金：

美国国家科学基金会;

关键词：

Dilute acid hydrolysis; Enzymatic hydrolysis; Switchgrass; Forest resources; Severity parameter; SULFURIC-ACID; CORN STOVER; KINETIC CHARACTERIZATION; ETHANOL-PRODUCTION; SOFTWOOD; CELLULOSE; FERMENTATION; SACCHARIFICATION; LIGNOCELLULOSICS; DIGESTIBILITY;

D O I：

10.1016/j.biortech.2009.11.038

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effects of dilute acid hydrolysis conditions were investigated on total sugar (glucose and xylose) yields after enzymatic hydrolysis with additional analyses on glucose and xylose monomer and oligomer yields from the individual hydrolysis steps for aspen (a hardwood), balsam (a softwood), and switchgrass (a herbaceous energy crop). The results of this study, in the form of measured versus theoretical yields and a severity analysis. show that for aspen and balsam, high dilute acid hydrolysis xylose yields were obtainable at all acid concentrations (0.25-0.75 wt.%) and temperatures (150-175 degrees C) studied as long as reaction time was optimized. Switchgrass shows a relatively stronger dependence on dilute acid hydrolysis acid concentration due to its higher neutralizing mineral content. Maximum total sugar (xylose and glucose; monomer plus oligomer) yields post-enzymatic hydrolysis for aspen, balsam, and switchgrass, were 88.3%, 21.2%, and 97.6%, respectively. In general, highest yields of total sugars (xylose and glucose; monomer plus oligomer) were achieved at combined severity parameter values (log CS) between 2.20 and 2.40 for the biomass species studied. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2317 / 2325

页数：9

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