Thermophysical characterization of ionic liquids able to dissolve biomass

M.G. Freire, A.R.R. Teles, M.A. Alves da Rocha, B. Schröder, C.M.S.S. Neves, P.J. Carvalho, D.V. Evtuguin, L.M.N.B.F. Santos, J.A.P. Coutinho

    Research output: Contribution to journalArticleAcademicpeer-review

    212 Citations (Scopus)

    Abstract

    Among new potential solvents for lignocellulosic materials, ionic liquids (ILs) are attracting considerable attention. Hence, the knowledge of the thermophysical properties of such fluids is essential for the design of related industrial processes. Therefore, in this work, a set of thermophysical properties, namely, density, viscosity, and refractive index, as a function of temperature, and isobaric thermal expansivity and heat capacities at a constant temperature, were determined for eight ionic liquids with the 1-ethyl-3-methylimidazolium cation combined with the following anions: acetate, methylphosphonate, methanesulfonate, trifluoromethanesulfonate, dicyanamide, thiocyanate, tosylate, and dimethylphosphate. Imidazolium-based ILs were chosen since these are the most studied ionic fluids in biomass dissolution approaches, while a large array of anions was investigated because it was already demonstrated that it is the IL anion that mainly governs the dissolution.
    Original languageEnglish
    Pages (from-to)4033-4041
    Number of pages10
    JournalJournal of Chemical and Engineering Data
    Volume56
    Issue number12
    DOIs
    Publication statusPublished - 2011

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