Densities and thermal conductivities of N-alkylpyridinium tetrafluoroborates at high pressure

Daisuke Tomida, Satoshi Kenmochi, Kun Qiao, Takao Tsukada, Chiaki Yokoyama

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


Densities and thermal conductivities are reported for a series of N-alkylpyridinium tetrafluoroborate compounds with butyl (N-butylpyridinium tetrafluoroborate), hexyl (N-hexylpyridinium tetrafluoroborate) and octyl (N-octylpyridinium tetrafluoroborate) groups. The densities were measured with a vibrating tube densimeter over the temperature range 293-353. K at pressures ≤20.0. MPa. The transient short hot wire method was used to measure thermal conductivity over the temperature range 294-335. K at pressures ≤20. MPa. It was found that the effect of alkyl chain length on thermal conductivities in N-alkylpyridinium tetrafluoroborates is the same degree as 1-alkyl-3-methylimidazolium tetrafluoroborates. The experimental values at 293. K and 0.1. MPa were consistent with the predicted values proposed by Fröba et al.

Original languageEnglish
Pages (from-to)31-36
Number of pages6
JournalFluid Phase Equilibria
Publication statusPublished - 2013 Feb 25


  • Density
  • Ionic liquid
  • N-Butylpyridinium tetrafluoroborate
  • N-Hexylpyridinium tetrafluoroborate
  • N-Octylpyridinium tetrafluoroborate
  • Thermal conductivity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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