Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

In this work, new results for density, viscosity, and vapour pressure of (triethylene glycol or propylene glycol) in H2O with LiCl or LiBr systems over temperatures ranging from 303.15 K to 343.15 K are presented. For each ternary system, four systems of which (4 to 25) mass% salt mixed with various glycols (50 to 80) mass% were studied. Incorporated with the pseudo-solvent approach, a vapour pressure model based on the mean spherical approximation for aqueous electrolyte solutions was used to represent the measured vapour pressure of the investigated systems. The present density and viscosity results were also correlated as a function of temperature and composition. The correlations yield satisfactory results. Compared to the conventionally used liquid desiccants, the vapour pressures of the systems studied yield smaller values of vapour pressures. The properties presented in this work are, in general, of sufficient accuracy for most engineering-design calculations.