Abstract

A comparative evaluation of five variants of Wilson model and eight unconstrained optimization methods for correlating the binary VLE data of 2-butanol-Tetrachloroethene system at 101.08 kPa pressure is presented. The data reduction and correlation for vapor/liquid equilibrium of the above system is presented. The objective of this paper was to find the parameters of the five variants of the Wilson models for the 2-butanol-tetrachloroethene, using optimization methods. The application of this optimization method for thermodynamic calculations is versatile due to its reliability, and efficiency is tested using phase equilibrium and parameter estimation problems. The obtained results indicated that proposed methodology is generally robust for the minimization of the objective functions involved in flash calculations using Gibbs energy minimization and in the calculation of homogeneous in non-reactive mixtures.

Key words: Binary VLE, 2-butanol, tetrachloroethene, unconstrained search methods, Wilson model, phase equilibria.