Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

Thermophysical properties of solvent are set of data that are essential for designing processes inindustry. But in the absence of experimental data, an accurate predictive method is required. In thiscontext, density and viscosity of sulfolane with glycerol and 1-butyl-3-methylimidazoliumbis(trifluoromethylsulfonyl)imide have been measured over the entire range of composition with tem-perature ranging from 298.15 K to 363.15 K at atmospheric pressure. From these experimental values,thermal expansion, excess molar volume, viscosity deviation and Gibbs free energy were calculated. The predicted values were close to the corresponding experimental data with all thestandard deviation lower than 1 * 10-3. Quantum chemical based COSMO-RS was used to predict themolecular interaction and non-ideal liquid phase activity coefficient for all mixtures. It has been inter-preted that strong interaction for the sulfolane + [BMIM][NTf2] system, meanwhile weak interaction wasdeduced for the sulfolane + glycerol system. The molar enthalpy, entropy and Gibbs free energyof activation of viscosity were calculated. Simultaneous effects of composition and temperature forthe binary mixtures were also reported.