Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Measurement and correlation of vapor pressure of benzene and thiophene with BMIM][PF6] and [BMIM][BF4] ionic liquids

Huo, Y.[Yan], Xia, S.[Shuqian], Yi, S.[Shouzhi], Ma, P.[Peisheng]
Fluid Phase Equilib. 2009, 276, 1, 46-52
ABSTRACT
An apparatus used to measure vapor pressure of organic solventswas set up, and vapor pressure of mixture of ionic liquids ([BMIM][PF6] and [BMIM][BF4]) and aromatic compounds (benzene and thiophene), with mole fraction of organic solute from0.1 to 0.75 was measured by using saturation vapor pressuremethod at temperature from303K to 343 K. Then NRTL equationwas used to correlate the experimental data. The overall average relative deviation of activity coefficients for the whole system is 2.30%, which indicates that NTRL equation can be utilized to correlate vapor pressure of binary systems containing ionic liquids. The results show that ionic liquids can depress the volatility of aromatic compounds.
Compounds
# Formula Name
1 C8H15F6N2P 1-butyl-3-methylimidazolium hexafluorophosphate
2 C8H15BF4N2 1-butyl-3-methylimidazolium tetrafluoroborate
3 C6H6 benzene
4 C4H4S thiophene
5 C6H12 cyclohexane
6 C3H8O propan-1-ol
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 6
  • 5
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 5; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 18
  • POMD
  • 3
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 3; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 54
  • POMD
  • 3
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 3; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 63
  • POMD
  • 4
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 4; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 27
  • POMD
  • 4
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 4; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 36