Document Detail

Characterization of low molecular weight organic acids from beech wood treated in supercritical water.
MedLine Citation:
PMID:  15930559     Owner:  NLM     Status:  MEDLINE    
Japanese beech (Fagus crenata Blume), its cell wall components, and model compounds were treated by supercritical water (380 degrees C, 100 MPa) for 5 s using a batch-type reactor to investigate the production behavior of low molecular weight organic acids. It was found that cellulose and hemicellulose were decomposed to formic acid, pyruvic acid, glycolic acid, acetic acid, and lactic acid, whereas lignin was barely decomposed to such organic acids under the given conditions. However, after prolonged treatment (380 degrees C, 100 MPa, 4 min) of lignin, some organic acids were recovered owing perhaps to the decomposition of the propyl side chain of lignin. It was additionally revealed that the predominant organic acid recovered was acetic acid, which might be derived from the acetyl group of hemicellulose in Japanese beech.
Kei Yoshida; Junko Kusaki; Katsunobu Ehara; Shiro Saka
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied biochemistry and biotechnology     Volume:  121-124     ISSN:  0273-2289     ISO Abbreviation:  Appl. Biochem. Biotechnol.     Publication Date:  2005  
Date Detail:
Created Date:  2005-06-02     Completed Date:  2005-06-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8208561     Medline TA:  Appl Biochem Biotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  795-806     Citation Subset:  IM    
Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 422, Japan.
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MeSH Terms
Acids / analysis,  chemical synthesis*
Cellulose / chemistry*
Chromatography, Supercritical Fluid / methods*
Fagus / chemistry*
Hot Temperature
Lignin / chemistry*
Molecular Weight
Organic Chemicals / analysis,  chemical synthesis*
Plant Extracts / chemistry
Water / chemistry*
Reg. No./Substance:
0/Acids; 0/Organic Chemicals; 0/Plant Extracts; 7732-18-5/Water; 9004-34-6/Cellulose; 9005-53-2/Lignin

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