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Disintegration and dissolution kinetics of wood chips in ionic liquids

11th EWLP, Hamburg, Germany, August 16–19, 2010
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Published/Copyright: May 29, 2011
Holzforschung
From the journal Volume 65 Issue 4

Abstract

Ionic liquids are able to dissolve polysaccharides and lignin, but there is only scarce knowledge about the dissolution of native wood. In the present paper, wood was dissolved by the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIMAc). A quantitative balance of the dissolved compounds is presented and the investigations are complemented by in situ microscopy of native wood in EMIMAc. The resulting dissolution kinetics in EMIMAc reveals distinct differences between spruce and beech. While particles of 0.1–0.5 mm of spruce dissolve slowly (up to 40% after 24 h), beech is dissolved more efficiently (75% after 24 h and 90% after 72 h). Wood chips of 10 mm length show similar dissolution kinetics and lignin yields of up to 10%. Microscopic studies reveal a disintegration of wood in EMIMAc into cells with large specific surface area, and differences in dissolution between spruce and beech were observed. These findings explain the size-independent dissolution of wood in EMIMAc and may open up new opportunities for the pretreatment of wood in ionic liquids.

Keywords: disintegration; dissolution; 1-ethyl-3-methylimidazolium acetate; EMIMAc; lignocellulose; ionic liquids; pretreatment; wood
Corresponding author. RWTH Aachen University, Aachener Verfahrenstechnik – Process Systems Engineering, 52056 Aachen, Germany
Received: 2010-10-30
Accepted: 2011-3-7
Published Online: 2011-05-29
Published Online: 2011-05-30
Published in Print: 2011-06-01

©2011 by Walter de Gruyter Berlin Boston

Articles in the same Issue

  1. Editorial
  2. EWLP 2010, 16th–19th August 2010, Hamburg, Germany
  3. Review
  4. Bio based fuels and fuel additives from lignocellulose feedstock via the production of levulinic acid and furfural
  5. Original Papers
  6. Optimization of steam pretreatment conditions for enzymatic hydrolysis of poplar wood
  7. Fungal pretreatment of pine wood to reduce the emission of volatile organic compounds
  8. Dilute acid pretreatment of starch-containing rice hulls for ethanol production
  9. Studies of the chemoenzymatic modification of cellulosic pulps by the laccase-TEMPO system
  10. Development of an integrated thermal and enzymatic hydrolysis for lignocellulosic biomass in fixed-bed reactors
  11. A larch based biorefinery: pre-extraction and extract fermentation to lactic acid
  12. Lignins as agents for bio-protection of wood
  13. Isolation and characterization of the phenolic fractions of wood pyrolytic oil
  14. Purification of Eucalyptus globulus water prehydrolyzates using the HiTAC process (high-temperature adsorption on activated charcoal)
  15. Disintegration and dissolution kinetics of wood chips in ionic liquids
  16. Ionic liquids as media for biomass processing: opportunities and restrictions
  17. Autohydrolysis of birch wood
  18. Solvent extraction as a means of preparing homogeneous lignin fractions
  19. Conditioning of SO2-ethanol-water spent liquor from spruce for the production of chemicals by ABE fermentation
  20. Total mass balances of SO2-ethanol-water (SEW) fractionation of forest biomass
  21. Lignin oxidation mechanisms under oxygen delignification conditions. Part 1. Results from direct analyses
  22. Lignin oxidation mechanisms under oxygen delignification conditions. Part 2: Advanced methods for the detailed characterization of lignin oxidation mechanisms
  23. Lignin oxidation mechanisms under oxygen delignification conditions. Part 3. Reaction pathways and modeling
  24. Simplified determination of total lignin content in kraft lignin samples and black liquors
  25. Xylan deposition onto eucalypt pulp fibers during oxygen delignification
  26. Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments
  27. Structure and antioxidant activity of diarylheptanoids extracted from bark of grey alder (Alnus incana) and potential of biorefinery-based bark processing of European trees
  28. Short Note
  29. Binding affinities of different metal ions to unbleached hardwood kraft pulp
  30. Meetings
  31. Meetings
https://doi.org/10.1515/hf.2011.072
Keywords for this article
disintegration; dissolution; 1-ethyl-3-methylimidazolium acetate; EMIMAc; lignocellulose; ionic liquids; pretreatment; wood

Articles in the same Issue

  1. Editorial
  2. EWLP 2010, 16th–19th August 2010, Hamburg, Germany
  3. Review
  4. Bio based fuels and fuel additives from lignocellulose feedstock via the production of levulinic acid and furfural
  5. Original Papers
  6. Optimization of steam pretreatment conditions for enzymatic hydrolysis of poplar wood
  7. Fungal pretreatment of pine wood to reduce the emission of volatile organic compounds
  8. Dilute acid pretreatment of starch-containing rice hulls for ethanol production
  9. Studies of the chemoenzymatic modification of cellulosic pulps by the laccase-TEMPO system
  10. Development of an integrated thermal and enzymatic hydrolysis for lignocellulosic biomass in fixed-bed reactors
  11. A larch based biorefinery: pre-extraction and extract fermentation to lactic acid
  12. Lignins as agents for bio-protection of wood
  13. Isolation and characterization of the phenolic fractions of wood pyrolytic oil
  14. Purification of Eucalyptus globulus water prehydrolyzates using the HiTAC process (high-temperature adsorption on activated charcoal)
  15. Disintegration and dissolution kinetics of wood chips in ionic liquids
  16. Ionic liquids as media for biomass processing: opportunities and restrictions
  17. Autohydrolysis of birch wood
  18. Solvent extraction as a means of preparing homogeneous lignin fractions
  19. Conditioning of SO2-ethanol-water spent liquor from spruce for the production of chemicals by ABE fermentation
  20. Total mass balances of SO2-ethanol-water (SEW) fractionation of forest biomass
  21. Lignin oxidation mechanisms under oxygen delignification conditions. Part 1. Results from direct analyses
  22. Lignin oxidation mechanisms under oxygen delignification conditions. Part 2: Advanced methods for the detailed characterization of lignin oxidation mechanisms
  23. Lignin oxidation mechanisms under oxygen delignification conditions. Part 3. Reaction pathways and modeling
  24. Simplified determination of total lignin content in kraft lignin samples and black liquors
  25. Xylan deposition onto eucalypt pulp fibers during oxygen delignification
  26. Dissolution of dissolving pulp in alkaline solvents after steam explosion pretreatments
  27. Structure and antioxidant activity of diarylheptanoids extracted from bark of grey alder (Alnus incana) and potential of biorefinery-based bark processing of European trees
  28. Short Note
  29. Binding affinities of different metal ions to unbleached hardwood kraft pulp
  30. Meetings
  31. Meetings
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