The effect of the ionic liquid anion in the pretreatment of pine wood chips
Abstract
The effect of the anion of ionic liquids on air-dried pine (Pinus radiata) has been investigated. All ionic liquids used in this study contained the 1-butyl-3-methylimidazolium cation; the anions were trifluoromethanesulfonate, methylsulfate, dimethylphosphate, dicyanamide, chloride and acetate. Using a protocol for assessing the ability to swell small wood blocks (10 × 10 × 5 mm), it was shown that the anion has a profound impact on the ability to promote both swelling and dissolution of biomass. Time course studies showed that viscosity, temperature and water content were also important parameters influencing the swelling process. We used Kamlet–Taft parameters to quantify the solvent polarity of the ionic liquids and found that the anion basicity described by the parameter β correlated with the ability to expand and dissolve pine lignocellulose. It is shown that 1-butyl-3-methylimidazolium dicyanamide dissolves neither cellulose nor lignocellulosic material.
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Lignocellulose deconstruction with ionic liquids typically involves heating well above 100 °C, with up to 190 °C reported.
“Lignocellulose deconstruction with ionic liquids typically involves heatingin many studies well above 100 °C (up to 190 °C has been reported).52,119”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [119]
Rogers and co-workers observed 15% weight loss within 10 min when treating bagasse and pine with [C2C1im][MeCO2] at 185 °C.
“Data from deconstruction experiments support this: Rogers and co-workers have observed 15% weight loss within 10 min when treating bagasse and pine with [C 2 C 1 im][MeCO 2 ] at 185 °C.119”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [119]
Rogers and co-workers reused [C2C1im][MeCO2] once after treatment of 4.8 wt% bagasse at 185 °C for 10 min; the delignification efficiency dropped from 63% to 38%.
“Rogers and co-workers reused [C 2 C 1 im][MeCO 2 ] once after treatment of 4.8 wt% bagasse at 185 °C for 10 min; 119 the delignification efficiency dropped from 63% to 38%.”
From Deconstruction of lignocellulosic biomass with ionic liquids (2013) · cites this paper as [119]
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References 37 · Cited by 333
- Authors
- Brandt, A., Hallett, J. P., Leak, D. J., Murphy, R. J., & Welton, T.
- Affiliations
- Imperial College London (GB)
- Corresponding author
- Welton, Tom
- Venue
- Green Chemistry
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2010
- Volume
- 12
- Issue
- 4
- Pages
- 672
- ISSN
- 1463-9262 (ISSN-L)
- 1463-9270
- OpenAlex
- W1995158566
- Cited by
- 333
- References
- 37
- Citations by year
- 2026: 7 · 2025: 7 · 2024: 9 · 2023: 9 · 2022: 11 · 2021: 17 · 2020: 19 · 2019: 26 · 2018: 23 · 2017: 21 · 2016: 27 · 2015: 35 · 2014: 37 · 2013: 26 · 2012: 29
- FWCI
- 11.39
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Green Chemistry (publishedVersion)
- Open Research (University of Surrey) (submittedVersion)
- Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
- Spiral (Imperial College London) (submittedVersion)
- Topics
- Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Physical Sciences › Materials Science › Biomaterials › Advanced Cellulose Research Studies
- Keywords
- ionic liquids, ionic liquid anions, pine wood chips, Pinus radiata, lignocellulosic biomass pretreatment, wood swelling, biomass dissolution, 1-butyl-3-methylimidazolium, dicyanamide, trifluoromethanesulfonate, Kamlet-Taft parameters, anion basicity, solvent polarity, viscosity, moisture content
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