Vapor-Liquid Equilibria of Coal-Derived Liquids Binary Systems with Tetralin

4 Vapor-Liquid Equilibria of Coal-Derived Liquids Binary Systems with Tetralin 

Blanco et al. (1994) presented VLE data at 26.66+0.03 kPa for binary systems of tetralin with p-xylene, g-picoline, piperidine, and pyridine. The data for the pyridine (1)—tetralin (2) binary are given in Table 15.7. 

Blanco et al. have also correlated the results with the van Laar, Wilson, NRTL and UNIQUAC activity coefficient models and found all of them able to describe the observed phase behavior. The value of the parameter ai2 in the NRTL model was set equal to 0.3. The estimated parameters were reported in Table 10 of the above reference. Using the data of Table 15.7 estimate the binary parameters in the Wislon, NRTL and UNIQUAC models. The objective function to be minimized is given by Equation 15.11. 

Parameter Estimation in Activity Coefficients Thermodynamic Models 

Temperature (K) Liquid Phase Mole Fraction of Pyridine ( l) Vapor Phase Mole Fraction ofTetralin (y0 Activity Coefficient of Pyridine (yO Activity Coefficient of Tetralin (y2) 

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