화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.52, No.1, 192-198, 2007
Vapor-liquid equilibrium for binary system of diethyl sulfide plus n-heptane and diethyl sulfide plus 2,2,4-trimethylpentane at (363.15 and 353.15) k
Isothermal vapor-liquid equilibrium (VLE) for diethyl sulfide + n-heptane and diethyl sulfide + 2,2,4-trimethylpentane at (363.15 and 353.15) K were measured with a circulation still. Maximum pressure azeotropes were found in both systems. The experimental results were correlated with the temperature-dependent Wilson model and also compared with the original UNIFAC and COSMO-RS predictive models. The measured diethyl sulfide + n-heptane VLE have been used simultaneously with the excess enthalpy from literature for a correlation of temperature-dependent Wilson parameters. Analyses of liquid- and vapor-phase composition were determined with a gas chromatograph and a refractometer. All VLE measurements passed the three thermodynamic consistency tests used.