Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Vapor-Liquid-Liquid Equilibria of Hydrofluorocarbons + 1-Butyl-3-methylimidazolium Hexafluorophosphate

Shiflett, M. B.[Mark B.], Yokozeki, A.
J. Chem. Eng. Data 2006, 51, 5, 1931-1939
ABSTRACT
In recent reports, we measured the vapor-liquid-liquid equilibria (VLLE) of trifluoromethane (R-23) and pentafluoroethane (R-125) with a room-temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6], using a volume-mass measurement method along various isotherms. In the present work, we complete similar investigation of VLLE for the methane and ethane series of hydrofluorocarbons (HFCs) in [bmim][PF6]. Compounds studied here are fluoromethane (R-41), 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1- trifluoroethane (R-143a), 1,1-difluoroethane (R-152a), and fluoroethane (R-161) in [bmim][PF6]. Observed VLLE behaviors are consistent with the earlier predictions by our equation-of-state (EOS) model, which showed partial immiscibilities in the HFC-rich side solutions, indicating type-III or type-V mixtures according to the Konynenburg- Scott classification. Thus, the present study as well as those with R-23 and R-125 reasonably validate our EOS model. In addition, very large negative excess molar volumes have been observed for all the studied systems, similar to that observed for mixtures with R-23 and R-125.
Compounds
# Formula Name
1 C8H15F6N2P 1-butyl-3-methylimidazolium hexafluorophosphate
2 C2H2F4 1,1,1,2-tetrafluoroethane
3 C2H3F3 1,1,1-trifluoroethane
4 C2H4F2 1,1-difluoroethane
5 CH3F fluoromethane
6 C2H5F fluoroethane
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
  • 5
  • 1
  • Molar volume, m3/mol ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 5
  • 1
  • Molar volume, m3/mol ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 5
  • 1
  • Mole fraction - 5 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 5
  • 1
  • Mole fraction - 5 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 2
  • 1
  • Molar volume, m3/mol ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 2
  • 1
  • Molar volume, m3/mol ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 2
  • 1
  • Mole fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 2
  • 1
  • Mole fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 3
  • 1
  • Molar volume, m3/mol ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 3
  • 1
  • Molar volume, m3/mol ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 3
  • 1
  • Mole fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 3
  • 1
  • Mole fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 4
  • 1
  • Molar volume, m3/mol ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 4
  • 1
  • Molar volume, m3/mol ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 4
  • 1
  • Mole fraction - 4 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 4
  • 1
  • Mole fraction - 4 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 3
  • POMD
  • 6
  • 1
  • Molar volume, m3/mol ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 5
  • POMD
  • 6
  • 1
  • Molar volume, m3/mol ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 5
  • POMD
  • 6
  • 1
  • Mole fraction - 6 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • volume-mass measurement method
  • 5
  • POMD
  • 6
  • 1
  • Mole fraction - 6 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Gas
  • volume-mass measurement method
  • 5