Measurement of high pressure densities and atmospheric pressure viscosities of alkyl phosphate anion ionic liquids and correlation with the ε-modified Sanchez-Lacombe equation of state

Yuya Hiraga, Musashi Goto, Yoshiyuki Sato, Richard L. Smith

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

High pressure densities up to 200 MPa from 313 to 393 K and atmospheric pressure viscosities from 293 to 373 K for two alkyl phosphate anion ionic liquids, 1-ethyl-3-methylimidazolium dimethylphosphate ([emim][DMP]) and 1-butyl-3-methylimidazolium dimethylphosphate ([bmim][DMP]), are reported. Several forms of the Tait equation were applied and all forms could correlate the data to within 0.03% average relative deviation (ARD). The derivative properties calculated had specific trends for the ionic liquids. The ε-modified Sanchez-Lacombe equation of state could correlate the data to within an ARD of 0.07%, and the deviations were lower than those of the original Sanchez-Lacombe equation of state (0.19%). The improvement by ε-modified Sanchez-Lacombe equation of state can be attributed its assumed close-packed density structure at low temperature.

Original languageEnglish
Pages (from-to)73-81
Number of pages9
JournalJournal of Chemical Thermodynamics
Volume104
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Density
  • Equation of state
  • Ionic liquid
  • Viscosity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

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