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Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates
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William Kenealy
Veröffentlicht/Copyright:
26. April 2007
Abstract
Wood chips of pine, spruce, aspen, and maple were treated at 135–140°C with diethyl oxalate (DEO) and analyzed for extractable and residual carbohydrates. Under these conditions, DEO hydrolyzes to ethanol and oxalic acid (OA). The amount and identity of carbohydrates released from the chips were species-dependent. For all wood species, increasing the amount of chemical, time, or temperature resulted in an increment in carbohydrates released. Approximately 50% (by wt) of extracted carbohydrates were monosaccharides. In addition, acetic acid was detected in the water extracts. When extracts were subsequently alkaline-treated, more acetate was released, indicating the presence of acetyl esters. The composition of water extracts and of wood chips after treatment indicates that these treatments primarily affect hemicelluloses. In summary, treatment of wood chips with DEO or OA releases carbohydrates suitable for fermentation, with no evidence of cellulose degradation.
Received: 2006-4-27
Accepted: 2007-1-19
Published Online: 2007-04-26
Published in Print: 2007-5-1
©2007 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- To all readers, authors and subscribers
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 1. Energy savings and improved pulps
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates
- Size exclusion chromatographic and UV-VIS absorption analyses of unbleached and bleached softwood kraft pulps using LiCl/1,3-dimethyl-2-imidazolidinone as a solvent
- A new method for the titration of free phenolic groups in pulps
- Adsorption of water-soluble organic dyes on ferrofluid-modified sawdust
- Mechanical properties and creep behavior of lyocell fibers by nanoindentation and nano-tensile testing
- Deformation behavior of wet lignocellulosic fibers
- Changes in physical, mechanical and chemical properties of wood during sterilisation by gamma radiation
- Penetration of poly(ethylene glycol) into wood cell walls of red pine
- Transverse mechanical behaviour and moisture absorption of waterlogged archaeological wood from the Vasa ship
- Determination of residual stress in bonded wood components
- Decohesion of glue bonds in wood connections
- Delamination assessment after drilling medium-density fibreboard (MDF) by digital image analysis
- Effects of thinning and fertilisation on tracheid dimensions and lignin content of Norway spruce
- Detection of β-1-4-galactan in compression wood of Sitka spruce [Picea sitchensis (Bong.) Carrière] by immunofluorescence
- Laboratory and outdoor water repellency and dimensional stability of southern pine sapwood treated with a waterborne water repellent made from resin acids
- Evidence of fungicidal and termicidal properties of Prunus africana heartwood extractives
- The effectiveness of silica treatments against wood-boring invertebrates
- Sap-staining fungi from logs and boards of two commercially important pines in Korea
- Improved quantitative determination of benzalkonium chloride in treated wood by liquid chromatography
- Obituary Anders Björkman (1920–2006)
Schlagwörter für diesen Artikel
biorefining;
ester;
hardwood;
hemicelluloses;
oxalic acid;
oxalate;
softwood
Artikel in diesem Heft
- To all readers, authors and subscribers
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 1. Energy savings and improved pulps
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates
- Size exclusion chromatographic and UV-VIS absorption analyses of unbleached and bleached softwood kraft pulps using LiCl/1,3-dimethyl-2-imidazolidinone as a solvent
- A new method for the titration of free phenolic groups in pulps
- Adsorption of water-soluble organic dyes on ferrofluid-modified sawdust
- Mechanical properties and creep behavior of lyocell fibers by nanoindentation and nano-tensile testing
- Deformation behavior of wet lignocellulosic fibers
- Changes in physical, mechanical and chemical properties of wood during sterilisation by gamma radiation
- Penetration of poly(ethylene glycol) into wood cell walls of red pine
- Transverse mechanical behaviour and moisture absorption of waterlogged archaeological wood from the Vasa ship
- Determination of residual stress in bonded wood components
- Decohesion of glue bonds in wood connections
- Delamination assessment after drilling medium-density fibreboard (MDF) by digital image analysis
- Effects of thinning and fertilisation on tracheid dimensions and lignin content of Norway spruce
- Detection of β-1-4-galactan in compression wood of Sitka spruce [Picea sitchensis (Bong.) Carrière] by immunofluorescence
- Laboratory and outdoor water repellency and dimensional stability of southern pine sapwood treated with a waterborne water repellent made from resin acids
- Evidence of fungicidal and termicidal properties of Prunus africana heartwood extractives
- The effectiveness of silica treatments against wood-boring invertebrates
- Sap-staining fungi from logs and boards of two commercially important pines in Korea
- Improved quantitative determination of benzalkonium chloride in treated wood by liquid chromatography
- Obituary Anders Björkman (1920–2006)
