Article
Licensed
Unlicensed
Requires Authentication
Hydrothermal dissolution of mixed southern hardwoods
-
Mehmet Sefik Tunc
Published/Copyright:
July 22, 2008
Abstract
A hydrothermal dissolution profile of wood components cellulose, hemicelluloses, and lignin of hardwood during autohydrolysis for 100 min at temperatures from 130 to 170°C in a modified accelerated solid extraction system (Dionex ASE-100) is described. The content of cellulose, hemicelluloses, lignin, acetyl, and uronic acid groups remaining in the extracted wood were determined. The extract was analyzed for oligosaccharides and monosaccharides, lignin, acetic acid, uronic acid, furfural, and hydroxymethylfurfural. Xylo-oligomers are the predominant component in the extract at temperatures higher than 150°C. At temperatures higher than 160°C, small amounts of furfural and hydroxymethylfurfural are generated. Most of the arabinan and galactan are removed from the wood at 160°C. The xylan remaining in the wood is acetylated at the same degree as in the original wood. In the extract, the ratio of acetyl groups bound to xylo-oligosaccharides decreases with increasing temperature. The content of uronic acid groups found in the extract obtained after autohydrolysis at T≥150°C is significantly smaller than that calculated from the decrease in uronic content of the wood.
Received: 2007-11-15
Accepted: 2008-4-25
Published Online: 2008-07-22
Published Online: 2008-07-22
Published in Print: 2008-09-01
©2008 by Walter de Gruyter Berlin New York
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- Original Papers
- Studies on the dehydrogenative polymerizations (DHPs) of monolignol β-glycosides: Part 4. Horseradish peroxidase-catalyzed copolymerization of isoconiferin and isosyringin
- Studies on the dehydrogenative polymerization of monolignol β-glycosides: Part 5. UV spectroscopic monitoring of horseradish peroxidase-catalyzed polymerization of monolignol glycosides
- Monolignol dehydrogenative polymerization in vitro in the presence of dioxane and a methylated β-β′ dimer model compound
- Structural characterization of milled wood lignins from different eucalypt species
- FTIR spectroscopy in combination with principal component analysis or cluster analysis as a tool to distinguish beech (Fagus sylvatica L.) trees grown at different sites
- Hydrothermal dissolution of mixed southern hardwoods
- Characterisation of fines from unbleached kraft pulps and their impact on sheet properties
- Effects of refining steam pressure on the properties of loblolly pine (Pinus taeda L.) fibers
- Elastic deformation mechanisms of softwoods in radial tension – Cell wall bending or stretching?
- Fiberboard bending properties as a function of density, thickness, resin, and moisture content
- Modification of Fagus sylvatica (L.) with 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU): Part 1. Estimation of heat adsorption by the isosteric method (Hailwood-Horrobin model) and by solution calorimetry
- Development of wooden block shear wall – Improvement of stiffness by utilizing elements of densified wood
- Significance of the heating rate on the physical properties of carbonized maple wood
- Exploring Scots pine fibre development mechanisms during TMP processing: Impact of cell wall ultrastructure (morphological and topochemical) on negative behaviour
- Pentachlorphenol migration from treated wood exposed to simulated rainfall
- Resistance of Trichoderma harzianum to the biocide tebuconazol – Proposed biodegradation pathways
- Short Notes
- On the variation of acid-labile aryl ether unit content in wood lignin
- Coumarins and secoiridoid glucosides from bark of Fraxinus rhynchophylla Hance
- Antifungal activities of heartwood extracts of Port-Orford cedar extractives
- Antifungal secoabietane dialdehyde and bisabolane-type terpenoids from the heartwood of Cryptomeria japonica D. Don
- Meetings
- Meetings
Keywords for this article
autohydrolysis;
extraction;
hardwood;
hemicelluloses;
lignin;
oligosaccharides;
xylan
Articles in the same Issue
- Original Papers
- Studies on the dehydrogenative polymerizations (DHPs) of monolignol β-glycosides: Part 4. Horseradish peroxidase-catalyzed copolymerization of isoconiferin and isosyringin
- Studies on the dehydrogenative polymerization of monolignol β-glycosides: Part 5. UV spectroscopic monitoring of horseradish peroxidase-catalyzed polymerization of monolignol glycosides
- Monolignol dehydrogenative polymerization in vitro in the presence of dioxane and a methylated β-β′ dimer model compound
- Structural characterization of milled wood lignins from different eucalypt species
- FTIR spectroscopy in combination with principal component analysis or cluster analysis as a tool to distinguish beech (Fagus sylvatica L.) trees grown at different sites
- Hydrothermal dissolution of mixed southern hardwoods
- Characterisation of fines from unbleached kraft pulps and their impact on sheet properties
- Effects of refining steam pressure on the properties of loblolly pine (Pinus taeda L.) fibers
- Elastic deformation mechanisms of softwoods in radial tension – Cell wall bending or stretching?
- Fiberboard bending properties as a function of density, thickness, resin, and moisture content
- Modification of Fagus sylvatica (L.) with 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU): Part 1. Estimation of heat adsorption by the isosteric method (Hailwood-Horrobin model) and by solution calorimetry
- Development of wooden block shear wall – Improvement of stiffness by utilizing elements of densified wood
- Significance of the heating rate on the physical properties of carbonized maple wood
- Exploring Scots pine fibre development mechanisms during TMP processing: Impact of cell wall ultrastructure (morphological and topochemical) on negative behaviour
- Pentachlorphenol migration from treated wood exposed to simulated rainfall
- Resistance of Trichoderma harzianum to the biocide tebuconazol – Proposed biodegradation pathways
- Short Notes
- On the variation of acid-labile aryl ether unit content in wood lignin
- Coumarins and secoiridoid glucosides from bark of Fraxinus rhynchophylla Hance
- Antifungal activities of heartwood extracts of Port-Orford cedar extractives
- Antifungal secoabietane dialdehyde and bisabolane-type terpenoids from the heartwood of Cryptomeria japonica D. Don
- Meetings
- Meetings
