Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Activity coefficients at infinite dilution for different alcohols and ketones in [EMpy][ESO4]: Experimental data and modeling with PC-SAFT

Dominguez, I.[Irene], Gonzalez, B.[Begona], Orge, B.[Beatriz], Held, C.[Christoph], Voges, M.[Matthias], Macedo, E. A.[Eugenia A.]
Fluid Phase Equilib. 2016, 424, 32-40
ABSTRACT
Experimental activity coefficients of different alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1- butanol, 2-butanol and 1-pentanol) and ketones (acetone, 2-butanone, 2-pentanone, 3-methyl-2- butanone and 4-methyl-2-pentanone) at infinite dilution in 1-Ethyl 3-Methylpyridinium Ethyl Sulfate ionic liquid ([EMpy][ESO4]) were measured at temperatures from 323 K to 373 K, using the inverse gas chromatography technique. The experimental results show that infinite dilution activity coefficients of both alcohols and ketones only marginally depend on temperature between 323 K and 373 K. Further, it could be observed that infinite dilution activity coefficients of methanol, ethanol, and 1-propanol are lower than unity, whereas 1-butanol and 1-pentanol activity coefficients at infinite dilution were higher than unity. In contrast, the activity coefficients at infinite dilution of all ketones were found to be greater than unity. Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) was used to model the obtained experimental data. Firstly, the pure-component parameters for [EMpy][ESO4] were determined by fitting experimental pure-IL densities and activity coefficients of 1-propanol. Based on this, activity coefficients in binary [EMpy][ESO4]/alcohol and [EMpy][ESO4]/ketone mixtures were modeled with good agreement to experimental data. Binary interaction parameters between [EMpy][ESO4]/alcohol and [EMpy][ESO4]/ ketone were used. They were found to depend logarithmically on the chain length of any alcohol or ketone, respectively.
Compounds
# Formula Name
1 CH4O methanol
2 C2H6O ethanol
3 C3H8O propan-1-ol
4 C4H10O butan-1-ol
5 C5H12O pentan-1-ol
6 C3H8O propan-2-ol
7 C4H10O butan-2-ol
8 C3H6O acetone
9 C4H8O butanone
10 C5H10O pentan-2-one
11 C5H10O 3-methyl-2-butanone
12 C6H12O 4-methylpentan-2-one
13 C10H17NO4S 1-ethyl-3-methylpyridinium ethylsulfate
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
  • 13
  • Activity coefficient - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • Chromatography
  • 6
  • POMD
  • 2
  • 13
  • Activity coefficient - 2 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • Chromatography
  • 5
  • POMD
  • 3
  • 13
  • Activity coefficient - 3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Chromatography
  • 5
  • POMD
  • 4
  • 13
  • Activity coefficient - 4 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 4; Liquid
  • Liquid
  • Chromatography
  • 3
  • POMD
  • 5
  • 13
  • Activity coefficient - 5 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 5; Liquid
  • Liquid
  • Chromatography
  • 3
  • POMD
  • 6
  • 13
  • Activity coefficient - 6 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 6; Liquid
  • Liquid
  • Chromatography
  • 6
  • POMD
  • 7
  • 13
  • Activity coefficient - 7 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 7; Liquid
  • Liquid
  • Chromatography
  • 5
  • POMD
  • 8
  • 13
  • Activity coefficient - 8 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 8; Liquid
  • Liquid
  • Chromatography
  • 6
  • POMD
  • 9
  • 13
  • Activity coefficient - 9 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 9; Liquid
  • Liquid
  • Chromatography
  • 6
  • POMD
  • 10
  • 13
  • Activity coefficient - 10 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 10; Liquid
  • Liquid
  • Chromatography
  • 5
  • POMD
  • 11
  • 13
  • Activity coefficient - 11 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 11; Liquid
  • Liquid
  • Chromatography
  • 5
  • POMD
  • 12
  • 13
  • Activity coefficient - 12 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 12; Liquid
  • Liquid
  • Chromatography
  • 5