Densities at pressures up to 20 MPa and thermal conductivities at 0.1 MPa of 1-butyl-3-methylimidazolium tetrafluoroborate + methanol mixtures

Daisuke Tomida, Tsuyoshi Odashima, Kun Qiao, Chiaki Yokoyama

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, we report densities and thermal conductivities for 1-butyl-3-methylimidazolium tetrafluoroborate + methanol mixtures. The densities were measured using a vibrating tube densimeter over the temperature range 293–333 K and at pressures up to 20 MPa. The expanded uncertainty in the density measurements was 0.22% (k = 2). The experimental values were correlated with a Tait equation with an average absolute deviation of 0.10%. The transient short hot-wire method was used to measure the thermal conductivities over the temperature range 295–335 K at 0.1 MPa. The expanded uncertainty in the thermal conductivity measurements was 4.4%. The thermal conductivities of the 1-butyl-3-methylimidazolium tetrafluoroborate + methanol mixtures increased in an approximately quadratically with increasing methanol mass fraction. The experimental values were correlated with a Jamieson equation with an average absolute deviation of 0.24%.

Original languageEnglish
Pages (from-to)299-310
Number of pages12
JournalHigh Temperatures - High Pressures
Volume47
Issue number4
Publication statusPublished - 2018 Jan 1

Keywords

  • 1-Butyl-3-methylimidazolium tetrafluoroborate
  • Density
  • High pressure
  • Ionic liquid
  • Methanol
  • Thermal conductivity
  • Transient short hot-wire

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

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