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Separation of hemicellulosic oligomers from steam-treated spruce wood using gel filtration

Palm, Magnus LU and Zacchi, Guido LU (2004) In Separation and Purification Technology 36(3). p.191-201
Abstract
Interest in the use of renewable raw materials for the production of various compounds that can replace fossil-based products is steadily increasing. In this study, the extraction and separation of hemicellulosic oligomers from spruce, to be used for the production of polymers such as hydrogels, was investigated. The focus of the study was on gel filtration of the solution from steam treatment of water impregnated spruce wood at 200degreesC for 2 min to separate oligomers from low-molecular-weight compounds. The total amount of oligomers extracted was approximately 6 g oligomers per 100 g dry wood, which corresponded to mannan and xylan yields of 30 and 17% of the theoretical amounts, respectively. The gel filtration yielded oligomer... (More)
Interest in the use of renewable raw materials for the production of various compounds that can replace fossil-based products is steadily increasing. In this study, the extraction and separation of hemicellulosic oligomers from spruce, to be used for the production of polymers such as hydrogels, was investigated. The focus of the study was on gel filtration of the solution from steam treatment of water impregnated spruce wood at 200degreesC for 2 min to separate oligomers from low-molecular-weight compounds. The total amount of oligomers extracted was approximately 6 g oligomers per 100 g dry wood, which corresponded to mannan and xylan yields of 30 and 17% of the theoretical amounts, respectively. The gel filtration yielded oligomer fractions completely free from low-molecular-weight compounds. The oligomer fractions collected for further processing had molecular weights of 600-12,000 g/mol, with the mean molecular weights of 5800 and 2900 g/mol, respectively. The composition of the O-acetyl-galactoglucomannan oligomers obtained, expressed as the ratio between mannan, glucan and galactan, was approximately 100:24:10. After gel filtration, the carbohydrate content of the dry matter in the oligomer fractions collected was 87-100%. The results of this Study indicate that gel filtration can be used to reduce the lignin content in the oligomer fractions, but not to remove it completely. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Separation and Purification Technology
volume
36
issue
3
pages
191 - 201
publisher
Elsevier
external identifiers
  • wos:000220984300003
  • scopus:1842579546
ISSN
1873-3794
DOI
10.1016/S1383-5866(03)00215-6
language
English
LU publication?
yes
id
26940fed-f405-4422-893c-017577477e8d (old id 138871)
date added to LUP
2007-06-25 14:24:52
date last changed
2017-02-19 03:24:19
@article{26940fed-f405-4422-893c-017577477e8d,
  abstract     = {Interest in the use of renewable raw materials for the production of various compounds that can replace fossil-based products is steadily increasing. In this study, the extraction and separation of hemicellulosic oligomers from spruce, to be used for the production of polymers such as hydrogels, was investigated. The focus of the study was on gel filtration of the solution from steam treatment of water impregnated spruce wood at 200degreesC for 2 min to separate oligomers from low-molecular-weight compounds. The total amount of oligomers extracted was approximately 6 g oligomers per 100 g dry wood, which corresponded to mannan and xylan yields of 30 and 17% of the theoretical amounts, respectively. The gel filtration yielded oligomer fractions completely free from low-molecular-weight compounds. The oligomer fractions collected for further processing had molecular weights of 600-12,000 g/mol, with the mean molecular weights of 5800 and 2900 g/mol, respectively. The composition of the O-acetyl-galactoglucomannan oligomers obtained, expressed as the ratio between mannan, glucan and galactan, was approximately 100:24:10. After gel filtration, the carbohydrate content of the dry matter in the oligomer fractions collected was 87-100%. The results of this Study indicate that gel filtration can be used to reduce the lignin content in the oligomer fractions, but not to remove it completely. (C) 2003 Elsevier B.V. All rights reserved.},
  author       = {Palm, Magnus and Zacchi, Guido},
  issn         = {1873-3794},
  language     = {eng},
  number       = {3},
  pages        = {191--201},
  publisher    = {Elsevier},
  series       = {Separation and Purification Technology},
  title        = {Separation of hemicellulosic oligomers from steam-treated spruce wood using gel filtration},
  url          = {http://dx.doi.org/10.1016/S1383-5866(03)00215-6},
  volume       = {36},
  year         = {2004},
}