Densities, viscosities, and surface tensions of the trifluoroethanol plus quinoline system

Abstract

Densities, viscosities, and surface tensions of 2,2,2-trifluoroethanol (TFE) + quinoline were measured at various temperatures and concentrations. This system was chosen as it is a possible candidate for an organic working pair for an absorption heat pump. All results were correlated by a polynomial equation as a function of temperature and concentration, and the parameters of the regression equation were determined by a least-squares method. The average absolute deviations between the experimental and calculated values in the density, viscosity, and surface tension measurements were 0.12, 1.8, and 0.76%, respectively. The density values decreased with increasing temperature and quinoline mass fraction. As the temperature of the liquid mixture increased and the quinoline mass fraction decreased, the viscosity and surface tension values decreased.