(174f) A Performance Comparison of Equations of State

At the outset of simulating a chemical or petroleum process, the process engineer must select between different property methods. The question that arises is: "Which property method is best for the simulation of this process?" In this article we review past publications regarding the comparison of accuracy of equations of state. We summarize what has been presented to date regarding accuracy of the most commonly used equations of state in process simulation. In addition, we calculate the predicted molar volume of a wide range of pure chemical compounds using four commonly used equations of state: Soave-Redlich-Kwong (SRK), Peng-Robinson (PR), Peng-Robinson-Stryjek-Vera (PRSV), and Lee-Kesler-Plocker (LKP). We compare these predictions with experimental data for these componds and present the results in a convenient tabular form. The purpose of the tabulated results is to assist process engineers in the selection of property methods by providing additional comparative data that has not been provided to date.