Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids: 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazolium Tetracyanoborate, and 1-Hexyl-3-methylimidazolium Tetracyanoborate

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9 Citations (Scopus)

Abstract

Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312-433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel-Fulcher-Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the ϵ∗-modified Sanchez-Lacombe equation of state are tabulated that allow correlation of the ionic-liquid high-pressure densities to within an ARD of less than 0.08%.

Original languageEnglish
Pages (from-to)972-980
Number of pages9
JournalJournal of Chemical and Engineering Data
Volume63
Issue number4
DOIs
Publication statusPublished - 2018 Apr 12

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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