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Acid-Catalyzed Conversion of Xylose in Methanol-Rich Medium as Part of Biorefinery.
MedLine Citation:
PMID:  22730169     Owner:  NLM     Status:  Publisher    
Acid treatments of xylose have been performed in a methanol/water mixture to investigate the reaction pathways of xylose during bio-oil esterification. Xylose was mainly converted into methyl xylosides with negligible humins formed below 130 °C. However, humins formation became significant with the dehydration of xylose to furfural and 2-(dimethoxymethyl)furan (DOF) at elevated temperatures. The conversion of xylose to methyl xylosides protected the C1 hydroxyl group of xylose, which stabilized xylose and suppressed the formation of sugar oligomers and polymerization reactions. In comparison, the conversion of furfural to DOF protected the carbonyl group of furfural. However, the protection did not remarkably suppress the polymerization of furfural at high temperatures because of the shift of the reaction equilibrium from DOF to furfural with a prolonged residence time. In addition, the acid treatment of furfural produced methyl levulinate in methanol and levulinic acid in water, which was catalyzed by formic acid.
Xun Hu; Caroline Lievens; Chun-Zhu Li
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-22
Journal Detail:
Title:  ChemSusChem     Volume:  -     ISSN:  1864-564X     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101319536     Medline TA:  ChemSusChem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fuels and Energy Technology Institute, Curtin University of Technology, GPO Box U1987, Perth, WA 6845 (Australia), Fax: (+61) 8-9266-1138.
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