Separation and recovery of the constituents from lignocellulosic biomass by using ionic liquids and acetic acid as co-solvents for mild hydrolysis

Jaap van Spronsen, Miguel A.Tavares Cardoso, Geert-Jan Witkamp, Wiebren de Jong, Maaike C. Kroon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Previously, ionic liquids were found to partially dissolve lignocellulosic biomass. Here, it is reported that the biomass itself does not dissolve directly, but that it is hydrolyzed first before the constituents (cellulose, hemicellulose and lignin) dissolve into the ionic liquid. By addition of an acidic catalyst, this hydrolysis step can take place at milder conditions. Acetic acid is chosen as a suitable acidic catalyst, because it is already present in lignocellulosic biomass in the form of acetyl groups on the hemicellulose. Here, it is shown that acetic acid also works as co-solvent, increasing the solubility of the constituents of lignocellulosic biomass in the ionic liquid. The milder conditions for hydrolysis result in a higher degree of utilization of the lignocellulosic biomass, whereby all constituents can be fully recovered and further processed and the ionic liquid can be reused.

Original languageEnglish (US)
Pages (from-to)196-199
Number of pages4
JournalChemical Engineering and Processing: Process Intensification
Volume50
Issue number2
DOIs
StatePublished - Feb 1 2011

Keywords

  • Acetic acid
  • Cellulose
  • Hemicellulose
  • Hydrolysis
  • Ionic liquid
  • Lignin
  • Lignocellulosic biomass
  • Mild conditions
  • Recovery

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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