Document Detail


Effects of dilute acid pretreatment conditions on enzymatic hydrolysis monomer and oligomer sugar yields for aspen, balsam, and switchgrass.
MedLine Citation:
PMID:  20018506     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Jill R Jensen; Juan E Morinelly; Kelsey R Gossen; Michael J Brodeur-Campbell; David R Shonnard
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2009-12-16
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-04-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2317-25     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Ltd. All rights reserved.
Affiliation:
Biochemical Engineering Laboratory, Department of Chemical Engineering, Michigan Technological University, Houghton, MI 49931, USA.
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MeSH Terms
Descriptor/Qualifier:
Glucose / biosynthesis*
Glucosidases / metabolism*
Hydrolysis / drug effects
Poaceae / drug effects*,  metabolism
Populus / drug effects*,  metabolism
Sulfuric Acids / pharmacology*
Temperature
Xylose / biosynthesis*
Chemical
Reg. No./Substance:
0/Sulfuric Acids; 0/Xylose; 50-99-7/Glucose; 7664-93-9/sulfuric acid; EC 3.2.1.-/Glucosidases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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