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Characterization of hemicelluloses in process streams in thermomechanical and chemi-thermomechanical pulp mills

Persson, Tobias LU and Jönsson, Ann Sofi LU (2017) In Journal of Wood Chemistry and Technology
Abstract

Increased interest in hemicelluloses as a renewable source of biopolymers has resulted in an interest in hemicelluloses in process streams in pulp mills. The aim of this study was to compare potential positions for the withdrawal of hemicelluloses from mechanical pulp mills. Samples were withdrawn at a total of fourteen positions from two thermomechanical and two chemi-thermomechanical pulp mills. The molecular mass distributions of hemicelluloses and lignin were determined by size-exclusion chromatography. Hemicelluloses showed peaks in the molecular mass interval of 0.2–2 kDa and 4–60 kDa, whereas lignin showed peaks in the range of 0.5–4 kDa, but no peak in the high-molecular-mass region. Glucomannan accounts for approximately... (More)

Increased interest in hemicelluloses as a renewable source of biopolymers has resulted in an interest in hemicelluloses in process streams in pulp mills. The aim of this study was to compare potential positions for the withdrawal of hemicelluloses from mechanical pulp mills. Samples were withdrawn at a total of fourteen positions from two thermomechanical and two chemi-thermomechanical pulp mills. The molecular mass distributions of hemicelluloses and lignin were determined by size-exclusion chromatography. Hemicelluloses showed peaks in the molecular mass interval of 0.2–2 kDa and 4–60 kDa, whereas lignin showed peaks in the range of 0.5–4 kDa, but no peak in the high-molecular-mass region. Glucomannan accounts for approximately two-thirds of the hemicellulose content of softwood, and mannan and glucan were thus the dominating saccharides in all samples. Mannan was preferentially found in fractions with a molecular mass ranging from 4 to 22 kDa.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
chemi-thermomechanical pulp mill, galactoglucomannan, Hemicelluloses, molecular mass distribution, thermomechanical pulp mill
in
Journal of Wood Chemistry and Technology
pages
7 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85011256385
  • wos:000399611900003
ISSN
0277-3813
DOI
10.1080/02773813.2016.1271433
language
English
LU publication?
yes
id
9cf93f2a-a62b-4e96-9378-8d9c19f069e2
date added to LUP
2017-02-15 14:43:47
date last changed
2018-01-14 04:30:04
@article{9cf93f2a-a62b-4e96-9378-8d9c19f069e2,
  abstract     = {<p>Increased interest in hemicelluloses as a renewable source of biopolymers has resulted in an interest in hemicelluloses in process streams in pulp mills. The aim of this study was to compare potential positions for the withdrawal of hemicelluloses from mechanical pulp mills. Samples were withdrawn at a total of fourteen positions from two thermomechanical and two chemi-thermomechanical pulp mills. The molecular mass distributions of hemicelluloses and lignin were determined by size-exclusion chromatography. Hemicelluloses showed peaks in the molecular mass interval of 0.2–2 kDa and 4–60 kDa, whereas lignin showed peaks in the range of 0.5–4 kDa, but no peak in the high-molecular-mass region. Glucomannan accounts for approximately two-thirds of the hemicellulose content of softwood, and mannan and glucan were thus the dominating saccharides in all samples. Mannan was preferentially found in fractions with a molecular mass ranging from 4 to 22 kDa.</p>},
  author       = {Persson, Tobias and Jönsson, Ann Sofi},
  issn         = {0277-3813},
  keyword      = {chemi-thermomechanical pulp mill,galactoglucomannan,Hemicelluloses,molecular mass distribution,thermomechanical pulp mill},
  language     = {eng},
  month        = {01},
  pages        = {7},
  publisher    = {Taylor & Francis},
  series       = {Journal of Wood Chemistry and Technology},
  title        = {Characterization of hemicelluloses in process streams in thermomechanical and chemi-thermomechanical pulp mills},
  url          = {http://dx.doi.org/10.1080/02773813.2016.1271433},
  year         = {2017},
}