TY  - JOUR
T1  - VLE Prediction of Azeotropic Systems using UNIQUAC and UNIFAC Models and
Experimental Validation using Othmer VLE Still
AU - Manojkumar, M.S. AU - Sivaprakash, B. 
JO  - Research Journal of Applied Sciences
VL  - 13
IS  - 3
SP  - 216
EP  - 224
PY  - 2018
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2018.216.224
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2018.216.224
KW  - Activity coefficient
KW  -azeotrope
KW  -non ideal system
KW  -thermodynamic consistency
KW  -UNIFAC Model
KW  -UNIQUAC Model
AB  - Vapour liquid equilibrium data are the basic need in the design of distillation columns. In the present
study, VLE prediction of four binary azeotropic systems namely ethanol-water, acetone-water, ethanol-benzene
and methanol-water was carried out using UNIQUAC and UNIFAC Models. UNIQUAC parameters of the
chosen systems were computed using Newton Raphson’s technique. Computations of UNIFAC Model were
done using ASOG method. VLE predicted from these models was validated using experimentations carried out
in othmer VLE still and thermodynamic consistency test using Redlich Keister method. It was observed that
both models are able to fit the experimental VLE data for all the systems. The results show that all the four
systems are minimum boiling azeotropes having positive deviation from ideality.
ER  -