Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermal stability and specific heats of {[emim][DCA] + [emim][TCM]} mixed ionic liquids

Navarro, P.[Pablo], Larriba, M.[Marcos], Garcia, J.[Julian], Rodriguez, F.[Francisco]
Thermochim. Acta 2014, 588, 22-7
ABSTRACT
Ionic liquids (ILs) have been revealed as promising solvents, specifically in the liquid-liquid extraction of aromatics from aliphatics. Nowadays, the use of binary mixtures of ILs is a usual trend looking for improving results achieved by pure ILs. {[emim][DCA] + [emim][TCM]} mixtures have shown good extractive properties. Thus, the goal of this work has been the study of the thermal stability and specific heats of the {[emim][DCA] + [emim][TCM]} IL mixtures. Isothermal TGA analyses were done to experimentally check the long term thermal stability, whereas dynamic TGA analyses were done to compare target parameters for the mixtures and to apply Seeberger et al. prediction method to calculate maximum operation temperatures (MOTs). Moreover, an ideal TGA mixing rule was proposed to describe the decomposition of the mixtures. Specific heats were also measured from 296.2 K to 372.2 K and the ideality of mixture was evaluated.
Compounds
# Formula Name
1 C8H11N5 1-ethyl-3-methylimidazolium dicyanamide
2 C10H11N5 1-ethyl-3-methyl-1H-imidazolium tricyanomethanide
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
  • 2
  • Molar heat capacity at constant pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Small sample (50 mg) DSC
  • 20
  • POMD
  • 1
  • 2
  • Molar heat capacity at constant pressure, J/K/mol ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Small sample (50 mg) DSC
  • 80