Comparative Study of Equations of State

Abstract

The objective of this work is to predict thermodynamic properties of pure component using equation of
state (EOS). Six EOSs used in this study, namely Soave-Redlich-Kwong (SRK), Peng-Robinson (PR), Schmidt-
Wenzel (SW), Patel-Teja (PT), Lawal-Lake-Silberberg (LLS), and Adachi-Lu-Sugie (ALS). The pure component
used include eleven hydrocarbon compounds from methane to normal decane and four non-hydrocarbon
compounds namely water, hydrogen sulphide, nitrogen, and carbon dioxide. The predicted properties include
vapor pressure, saturated vapor and liquid volumes, in temperature range from triple to critical point. A computer
code using Matalab software is written to facilitate the calculation. The predicted resulted is compared with
experimental data. The results reveled with exception SW EOSs all EOSs are inconsistent in the prediction of
thermodynamics properties of the fluids under consideration. SW predicted all properties with absolute average
percent deviation (AAPD) of less that 3