Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Activity coefficients at infinite dilution of organic solutes in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate using gas liquid chromatography at T = (313.15, 323.15, and 333.15) K

Olivier, E.[Eugene], Letcher, T. M.[Trevor M.], Naidoo, P.[Paramespri], Ramjugernath, D.[Deresh]
J. Chem. Thermodyn. 2010, 42, 5, 646-650
ABSTRACT
Activity coefficients at infinite dilution were determined for 24 solutes: n-alkanes, alk-1-enes, alk-1-ynes, cycloalkanes, alkylbenzenes and alcohols in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate, [OMIM][PF6], by gas liquid chromatography at three different temperatures T = (313.15, 323.15, and 333.15) K. The partial molar excess enthalpy values at infinite dilution were calculated from the experimental data over the same temperature range. Capacities and selectivities at infinite dilution for the systems hexane/benzene and methanol/benzene were determined from the experimental data and compared to the literature values for other ionic liquids, as well as for industrial molecular solvents. The influence of the cation and anion of the ionic liquid on the activity coefficient is discussed, as well as the usefulness of [OMIM][PF6] in separating organic liquids.
Compounds
# Formula Name
1 C12H23F6N2P 1-octyl-3-methylimidazolium hexafluorophosphate
2 C5H12 pentane
3 C6H14 hexane
4 C7H16 heptane
5 C8H18 octane
6 C10H22 decane
7 C11H24 undecane
8 C6H12 hex-1-ene
9 C7H14 1-heptene
10 C8H16 oct-1-ene
11 C9H18 1-nonene
12 C10H20 1-decene
13 C5H8 1-pentyne
14 C6H10 1-hexyne
15 C7H12 1-heptyne
16 C8H14 1-octyne
17 C5H10 cyclopentane
18 C6H12 cyclohexane
19 C7H14 cycloheptane
20 C8H16 cyclooctane
21 CH4O methanol
22 C2H6O ethanol
23 C6H6 benzene
24 C7H8 toluene
25 C8H10 ethylbenzene
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
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 2
  • 1
  • Activity coefficient - 2 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 3
  • 1
  • Activity coefficient - 3 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 4
  • 1
  • Activity coefficient - 4 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 4; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 5
  • 1
  • Activity coefficient - 5 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 5; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 6
  • 1
  • Activity coefficient - 6 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 6; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 7
  • 1
  • Activity coefficient - 7 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 7; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 8
  • 1
  • Activity coefficient - 8 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 8; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 9
  • 1
  • Activity coefficient - 9 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 9; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 10
  • 1
  • Activity coefficient - 10 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 10; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 11
  • 1
  • Activity coefficient - 11 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 11; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 12
  • 1
  • Activity coefficient - 12 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 12; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 13
  • 1
  • Activity coefficient - 13 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 13; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 14
  • 1
  • Activity coefficient - 14 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 14; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 15
  • 1
  • Activity coefficient - 15 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 15; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 16
  • 1
  • Activity coefficient - 16 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 16; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 17
  • 1
  • Activity coefficient - 17 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 17; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 18
  • 1
  • Activity coefficient - 18 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 18; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 19
  • 1
  • Activity coefficient - 19 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 19; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 20
  • 1
  • Activity coefficient - 20 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 20; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 21
  • 1
  • Activity coefficient - 21 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 21; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 22
  • 1
  • Activity coefficient - 22 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 22; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 23
  • 1
  • Activity coefficient - 23 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 23; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 24
  • 1
  • Activity coefficient - 24 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 24; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6
  • POMD
  • 25
  • 1
  • Activity coefficient - 25 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 25; Liquid
  • Liquid
  • Gas
  • Chromatography
  • 6