Aspen Physical Property System - Physical Property Models

Parameter
Name/Element
2 Thermodynamic Property Models 189
Symbol Default MDS Lower Limit Upper
Limit
PC p ci — — 10 5
OMEGA � i
References
10 8
— — -0.5 2.0 —
Units
H.G. Grayson and C.W. Streed, Paper 20-PO7, Sixth World Petroleum
Conference, Frankfurt, June 1963.
Kent-Eisenberg Liquid Fugacity Model
PRESSURE
The Kent-Eisenberg model calculates liquid mixture component fugacity
coefficients and liquid enthalpy for the AMINES property method.
The chemical equilibria in H2S + CO2 + amine systems are described using
these chemical reactions:
Where:
R' = Alcohol substituted alkyl groups
The equilibrium constants are given by:
The chemical equilibrium equations are solved simultaneously with the
balance equations. This obtains the mole fractions of free H2S and CO2 in
solution. The equilibrium partial pressures of H2S and CO2 are related to the
respective free concentrations by Henry's constants: