THE USE OF WILSON EQUATION, NRTL AND UNIQUAC IN PREDICTING VLE OF TERNARY SYSTEMS
ABSTRACT: There binary pairs
of aceton-butanol, aseton-ethanol, n-butanol-ethanol and ternary pairs
ofaceton-butanol-ethanol have been measured under atmospheric pressure. The
equipment used forthis experimental work was the Modified Glass-Othmer Still.
The analyses performed with aShimatzu gas chromatograph. Thermodynamic
consistency of the observed binary VLE areconfirmed by the area test, which
show that the experimental data of all of binary systems arethermodinamically
consistent. The observed activity coefficients are correlated with the
Wilson,NRTL dan UNIQUAC equations. The binary interaction parameters in each
equation aredetermined by using the Gaussian technique, where the sum of
squares of deviation in excessGibbs energy is minimized. The Wilson, NRTL dan
UNIQUAC equation agree well with theexperimental data, except that the NRTL
equation has second parameter different from theproposed value. The ternary VLE
for aceton-butanol-ethanol system is calculated by using binaryinteraction
parameter of Wilson, NRTL dan UNIQUAC obtained from three pairs
binaryexperimental data. The ternary experimental data were also compared with
those predicted byadopting the Wilson, NRTL dan UNIQUAC models. Based on these
deviations, the Wilson modelseems to be the potential candidate to be used to
predict the VLE ternary mixture for those system.
Penulis: Agung Rasmito, Yustia
Wulandari
Kode Jurnal: jpkimiadd100192
