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Cost estimates of kraft lignin recovery by ultrafiltration

Jönsson, Ann-Sofi LU and Wallberg, Ola LU (2009) In Desalination 237(1-3). p.254-267
Abstract
Climate change and endeavours towards a sustainable society have brought the interest of wood-based biorefineries to the fore. Lignin is the main energy carrier in chemical pulp mills. Today, the heat value of lignin is commonly recovered in the recovery boiler of the mill. However, interest in the extraction of lignin for use as an external biofuel and in speciality chemicals is growing. Lignosulphonates have been isolated by ultrafiltration from spent liquor in sulphite pulp mills for decades, whereas kraft lignin is mainly extracted by precipitation. The isolation of kraft lignin by ultrafiltration is currently attracting increasingly greater interest because lignin can be extracted from pulping liquors at almost all positions in a pulp... (More)
Climate change and endeavours towards a sustainable society have brought the interest of wood-based biorefineries to the fore. Lignin is the main energy carrier in chemical pulp mills. Today, the heat value of lignin is commonly recovered in the recovery boiler of the mill. However, interest in the extraction of lignin for use as an external biofuel and in speciality chemicals is growing. Lignosulphonates have been isolated by ultrafiltration from spent liquor in sulphite pulp mills for decades, whereas kraft lignin is mainly extracted by precipitation. The isolation of kraft lignin by ultrafiltration is currently attracting increasingly greater interest because lignin can be extracted from pulping liquors at almost all positions in a pulp mill using ceramic membranes, without altering the pH or temperature of the liquor. In this work hardwood lignin was recovered from two process streams in a kraft pulp mill by Ultrafiltration with a ceramic membrane with a cut-off of 15,000 Da. It was shown that lignin can be recovered from a cooking liquor at a cost of about 60 (sic) per tonne of lignin and from black liquor withdrawn from the evaporation unit at 33 (sic) per tonne. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Kraft black liquor, Ultrafiltration, Cost estimates, Ceramic membrane, Biorefinery, Lignin recovery
in
Desalination
volume
237
issue
1-3
pages
254 - 267
publisher
Elsevier
external identifiers
  • wos:000263444500023
  • scopus:58149187863
ISSN
1873-4464
DOI
10.1016/j.desal.2007.11.061
language
English
LU publication?
yes
id
cb829a7b-3e25-4447-b3a8-52483f5f3937 (old id 1372525)
date added to LUP
2009-05-08 13:20:41
date last changed
2017-12-10 03:45:00
@article{cb829a7b-3e25-4447-b3a8-52483f5f3937,
  abstract     = {Climate change and endeavours towards a sustainable society have brought the interest of wood-based biorefineries to the fore. Lignin is the main energy carrier in chemical pulp mills. Today, the heat value of lignin is commonly recovered in the recovery boiler of the mill. However, interest in the extraction of lignin for use as an external biofuel and in speciality chemicals is growing. Lignosulphonates have been isolated by ultrafiltration from spent liquor in sulphite pulp mills for decades, whereas kraft lignin is mainly extracted by precipitation. The isolation of kraft lignin by ultrafiltration is currently attracting increasingly greater interest because lignin can be extracted from pulping liquors at almost all positions in a pulp mill using ceramic membranes, without altering the pH or temperature of the liquor. In this work hardwood lignin was recovered from two process streams in a kraft pulp mill by Ultrafiltration with a ceramic membrane with a cut-off of 15,000 Da. It was shown that lignin can be recovered from a cooking liquor at a cost of about 60 (sic) per tonne of lignin and from black liquor withdrawn from the evaporation unit at 33 (sic) per tonne.},
  author       = {Jönsson, Ann-Sofi and Wallberg, Ola},
  issn         = {1873-4464},
  keyword      = {Kraft black liquor,Ultrafiltration,Cost estimates,Ceramic membrane,Biorefinery,Lignin recovery},
  language     = {eng},
  number       = {1-3},
  pages        = {254--267},
  publisher    = {Elsevier},
  series       = {Desalination},
  title        = {Cost estimates of kraft lignin recovery by ultrafiltration},
  url          = {http://dx.doi.org/10.1016/j.desal.2007.11.061},
  volume       = {237},
  year         = {2009},
}