PREDICTION OF AZEOTROPIC P-T-X SPACE

Abstract

A method has been developed for prediction of Azeotropic P-T-X space using Gauss-seidel iterative technique. The mathematical equations so developed were solved on computer. The non-ideality in the vapour phase has been incorporated in terms of the virial equation of state and the excess Gibb's free energy of mixing is calculated using Wilson's equation and Hildebrand's solution theory. The polarity effects has also been incorporated in Hildebrand's model. The method has been tested using data for the system: Ethylalcohol-water, Ethylalcoba-Benzene, Ethylalcohol-Ethylacetate, Hexane-Benzene, Benzene-Cyclohexane, Methylalcohol-carbon-Tetrachloride and water-formic acid. The predic-ted azeotropic temperatures and compositions are found to be in excellent agreement with the experimental values for Wilson's model (Maximum deviation 1.5%) and a satis-factory agreement with Hildebrand's model (Maximum devi-ation 5.0%).