Ionic liquids in extractive distillation of ethanol/water : from laboratory to pilot plant

G.W. Meindersma, E. Quijada-Maldonado, T.A.M. Aelmans, J.P. Gutierrez, A.B. Haan, de

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

    25 Citations (Scopus)

    Abstract

    The ionic liquid 1-ethyl-3-methylimidazolium dicyanamide, [C2mim]N(CN)2 is a suitable solvent for the extractive distillation of ethanol/water mixtures. This IL has comparable relative ethanol/water volatility as the benchmark solvent ethylene glycol (EG). Pilot plant experiments with both EG and [C2mim]N(CN)2 as solvent proved that the developed model for the extractive distillation of ethanol/water could well describe the experimental results. The achieved purity of the ethanol in the pilot plant using [C2mim]N(CN)2 as solvent was 99.91%. A conceptual process was designed for both the benchmark solvent EG and the IL. The process with the IL as solvent required 11% more energy than that with EG as solvent. However, if heat integration is implemented, the extractive distillation with the IL requires 16% less energy than the EG-based process. The key performance points for extractive distillation of ethanol/water mixtures are the recovery of the ionic liquid and the heat integration.
    Original languageEnglish
    Title of host publicationIonic Liquids : Science and Applications
    EditorsA.E. Visser, N.J. Bridges, R.D. Rogers
    Place of PublicationWashington D.C.
    PublisherAmerican Chemical Society
    Pages239-257
    ISBN (Print)9780841227637
    DOIs
    Publication statusPublished - 2012

    Publication series

    NameACS Symposium Series
    Volume1117
    ISSN (Print)0097-6156

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