Aspen Physical Property System - Physical Property Models

Parameter
Name/
Element
SRKLIJ/3 l ij (3)
Symbol Default MDS Lower
Limit
2 Thermodynamic Property Models 61
Upper
Limit
Units
0 x — — TEMPERATURE
SRKLIJ/4 T lower 0 x — — TEMPERATURE
SRKLIJ/5 T upper 1000 x — — TEMPERATURE
References
G. Soave, "Equilibrium Constants for Modified Redlich-Kwong Equation-ofstate,"
Chem. Eng. Sci., Vol. 27, (1972), pp. 1196 - 1203.
A. Peneloux, E. Rauzy, and R. Freze, "A Consistent Correction For Redlich-
Kwong-Soave Volumes", Fluid Phase Eq., Vol. 8, (1982), pp. 7–23.
P.M. Mathias, H.C. Klotz, and J.M. Prausnitz, "Equation of state mixing rules
for multicomponent mixtures: the problem of invariance," Fluid Phase
Equilibria, Vol 67, (1991), pp. 31-44.
SRK-Kabadi-Danner
The SRK-Kabadi-Danner property model uses the SRK equation-of-state with
improved phase equilibrium calculations for mixtures containing water and
hydrocarbons. These improvements are achieved by using the Kabadi-Danner
mixing rules.
The form of the equation-of-state is:
Where:
a0 is the standard quadratic mixing term:
Where:
;
The best values of kwj (w = water) were obtained from experimental data.
Results are given for seven homologous series.
Best Fit Values of kwj for Different Homologous Series
with Water
Homologous series k wj
Alkanes 0.500
Alkenes 0.393
Dialkenes 0.311