Fractionation and concentration of kraft black liquor lignin with ultrafiltration
Wallberg, Ola LU
; Jönsson, Ann-Sofi
LU
and Wimmerstedt, Roland
LU
(2003)
In Desalination
154(2).
p.187-199
- Abstract
- Kraft black liquor lignin is a biofuel that is separated from the cellulose during kraft pulping. Improved technology and energy integration in paper mills have led to an energy surplus at many mills. It is therefore of great interest to extract the lignin from the pulp mill and sell it as fuel to replace fossil fuel in other furnaces. The fractionation of kraft black liquor with a total dry matter content of about 15 wt% has been studied using ultrafiltration. The flux for three polymeric membranes with different cut-offs was investigated as well as their retention of lignin and other process specific substances. The retention of lignin for the three membranes with cut-offs of 4,8 and 20 kDa was 80%, 67% and 45%, respectively. The... (More)
- Kraft black liquor lignin is a biofuel that is separated from the cellulose during kraft pulping. Improved technology and energy integration in paper mills have led to an energy surplus at many mills. It is therefore of great interest to extract the lignin from the pulp mill and sell it as fuel to replace fossil fuel in other furnaces. The fractionation of kraft black liquor with a total dry matter content of about 15 wt% has been studied using ultrafiltration. The flux for three polymeric membranes with different cut-offs was investigated as well as their retention of lignin and other process specific substances. The retention of lignin for the three membranes with cut-offs of 4,8 and 20 kDa was 80%, 67% and 45%, respectively. The retention of sulphur and sodium was zero for all three membranes. The purity of the final lignin fuel is of importances as the ash content preferably should be as low as possible. The flux and retention during concentration and diafiltration of the black liquor were therefore studied. The dialfiltration operation was conducted in batch and semicontinuous mode. The lignin purity was 36% in the original kraft black liquor and 78% after semi-continuous dialfiltration. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/129403
- author
- Wallberg, Ola
LU
; Jönsson, Ann-Sofi
LU
and Wimmerstedt, Roland
LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Desalination
- volume
- 154
- issue
- 2
- pages
- 187 - 199
- publisher
- Elsevier
- external identifiers
-
- wos:000181363500009
- scopus:0037445876
- ISSN
- 1873-4464
- DOI
- 10.1016/S0011-9164(03)80019-X
- language
- English
- LU publication?
- yes
- id
- d2f2b3fa-b7ea-47af-8c87-cb9b7fe37a4a (old id 129403)
- date added to LUP
- 2016-04-01 11:51:42
- date last changed
- 2023-11-25 16:26:34
@article{d2f2b3fa-b7ea-47af-8c87-cb9b7fe37a4a,
abstract = {{Kraft black liquor lignin is a biofuel that is separated from the cellulose during kraft pulping. Improved technology and energy integration in paper mills have led to an energy surplus at many mills. It is therefore of great interest to extract the lignin from the pulp mill and sell it as fuel to replace fossil fuel in other furnaces. The fractionation of kraft black liquor with a total dry matter content of about 15 wt% has been studied using ultrafiltration. The flux for three polymeric membranes with different cut-offs was investigated as well as their retention of lignin and other process specific substances. The retention of lignin for the three membranes with cut-offs of 4,8 and 20 kDa was 80%, 67% and 45%, respectively. The retention of sulphur and sodium was zero for all three membranes. The purity of the final lignin fuel is of importances as the ash content preferably should be as low as possible. The flux and retention during concentration and diafiltration of the black liquor were therefore studied. The dialfiltration operation was conducted in batch and semicontinuous mode. The lignin purity was 36% in the original kraft black liquor and 78% after semi-continuous dialfiltration.}},
author = {{Wallberg, Ola and Jönsson, Ann-Sofi and Wimmerstedt, Roland}},
issn = {{1873-4464}},
language = {{eng}},
number = {{2}},
pages = {{187--199}},
publisher = {{Elsevier}},
series = {{Desalination}},
title = {{Fractionation and concentration of kraft black liquor lignin with ultrafiltration}},
url = {{http://dx.doi.org/10.1016/S0011-9164(03)80019-X}},
doi = {{10.1016/S0011-9164(03)80019-X}},
volume = {{154}},
year = {{2003}},
}