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

J. Spronsen, van, M.A. Tavares Cardoso, G.J. Witkamp, Wiebren de Jong, M.C. Kroon

    Research output: Contribution to journalArticleAcademicpeer-review

    51 Citations (Scopus)
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    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
    Pages (from-to)196-199
    Number of pages4
    JournalChemical Engineering and Processing : Process Intensification
    Volume50
    Issue number2
    DOIs
    Publication statusPublished - 2011

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