Isobaric (vapor + liquid) equilibria for 2-methylthiophene with n-heptane, 2,2,4-trimethylpentane, n-nonane and n-decane at 90.00 kPa

Isobaric vapor-liquid equilibrium (VLE) data for the four systems n -heptane   +   2-methylthiophene, 2,2,4-trimethylpentane   +   2-methylthiophene, n -nonane   +   2-methylthiophene, n -decane   +   2-methylthiophene were measured at 90.00   kPa with a modified Rose-Williams still. Gas chromatography equipped with a flame ionization detector was used to analyze composition of the samples from the vapor-liquid equilibrium systems. All the VLE measurements passed the thermodynamic consistent test using the Herington method and the Van Ness test. The azeotropic behavior was found in the 2,2,4-trimethylpentane   +   2-methylthiophene system. The experimental data were correlated by the Wilson and NRTL activity coefficient models and also compared with the original UNIFAC predictive model. The corresponding parameters for the three models were obtained. The results exhibited that the measured data got agree well with the calculated values using the Wilson, NRTL and original UNIFAC models.