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Lignin recovery from Norway spruce using steam pretreatment and hydrotropic extraction

Tanis, Medya Hatun LU orcid ; Al-Rudainy, Basel LU orcid and Wallberg, Ola LU orcid (2025) In Holzforschung
Abstract

Lignin, often considered the most undervalued part of lignocellulose, holds significant potential as a renewable source of valuable chemicals and materials. This study explores new insights into lignin recovery from Norway spruce using two fractionation strategies: (1) hydrotropic extraction (HEX), and (2) steam pretreatment (SE) followed by HEX. The effects of varying sodium xylenesulfonate (SXS) concentrations and catalyst addition on lignin recovery were investigated. The one- and two-step processes achieved lignin recovery rates of 37 % and 29 %, respectively, which are among the highest reported for Norway spruce. The lignin samples were analyzed and compared by FTIR, SEC, and 2D HSQC NMR. The lignin samples showed differences in... (More)

Lignin, often considered the most undervalued part of lignocellulose, holds significant potential as a renewable source of valuable chemicals and materials. This study explores new insights into lignin recovery from Norway spruce using two fractionation strategies: (1) hydrotropic extraction (HEX), and (2) steam pretreatment (SE) followed by HEX. The effects of varying sodium xylenesulfonate (SXS) concentrations and catalyst addition on lignin recovery were investigated. The one- and two-step processes achieved lignin recovery rates of 37 % and 29 %, respectively, which are among the highest reported for Norway spruce. The lignin samples were analyzed and compared by FTIR, SEC, and 2D HSQC NMR. The lignin samples showed differences in molecular weights, polydispersity, and interunit linkage abundance.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
hydrotrope, lignin recovery, sodium xylenesulfonate, softwood, steam pretreatment, two-step fractionation
in
Holzforschung
pages
12 pages
publisher
De Gruyter
external identifiers
  • scopus:105026693506
ISSN
0018-3830
DOI
10.1515/hf-2025-0092
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 the author(s), published by De Gruyter, Berlin/Boston.
id
34159924-8a80-4102-97f0-563cc632f5f0
date added to LUP
2026-01-15 12:00:00
date last changed
2026-01-15 13:56:41
@article{34159924-8a80-4102-97f0-563cc632f5f0,
  abstract     = {{<p>Lignin, often considered the most undervalued part of lignocellulose, holds significant potential as a renewable source of valuable chemicals and materials. This study explores new insights into lignin recovery from Norway spruce using two fractionation strategies: (1) hydrotropic extraction (HEX), and (2) steam pretreatment (SE) followed by HEX. The effects of varying sodium xylenesulfonate (SXS) concentrations and catalyst addition on lignin recovery were investigated. The one- and two-step processes achieved lignin recovery rates of 37 % and 29 %, respectively, which are among the highest reported for Norway spruce. The lignin samples were analyzed and compared by FTIR, SEC, and 2D HSQC NMR. The lignin samples showed differences in molecular weights, polydispersity, and interunit linkage abundance.</p>}},
  author       = {{Tanis, Medya Hatun and Al-Rudainy, Basel and Wallberg, Ola}},
  issn         = {{0018-3830}},
  keywords     = {{hydrotrope; lignin recovery; sodium xylenesulfonate; softwood; steam pretreatment; two-step fractionation}},
  language     = {{eng}},
  publisher    = {{De Gruyter}},
  series       = {{Holzforschung}},
  title        = {{Lignin recovery from Norway spruce using steam pretreatment and hydrotropic extraction}},
  url          = {{http://dx.doi.org/10.1515/hf-2025-0092}},
  doi          = {{10.1515/hf-2025-0092}},
  year         = {{2025}},
}