Abstract

In this work, a two parameter cubic equation of state is presented. The parameters of the new cubic equation of state are considered temperature dependent. For calculating the thermodynamic properties of a pure hydrocarbon, this equation of state requires the critical temperature, the critical pressure and the acentric factor of hydrocarbon. The proposed equation of state is applied for PVT and VLE calculations of different pure hydrocarbons and fluid mixtures. The results are compared with those obtained by two commonly used cubic equation of state. The comparisons indicate that the new equation of state yields better results.

Highlights

  • Equations of state have been used to predict phase equilibria in refinery, petroleum reservoir and other chemical industries

  • In order to test the validity of the new cubic equation of state the maximum packing fractions (MPF) for different hydrocarbons can be determined by considering the triple point and critical density of hydrocarbon according to this equation of state

  • The maximum packing fraction (MPF) of various hydrocarbons calculated from the new cubic equation of state ηmax

Read more

Summary

A New Cubic Equation of State for Predicting Phase Behavior of Hydrocarbons

Résumé — Une nouvelle équation d’état cubique pour prédire le comportement de phase d'hydrocarbures — Nous présentons une nouvelle équation d’état cubique à deux paramètres. Les paramètres de la nouvelle équation d'état sont considérés dépendant de la température. Pour calculer les propriétés thermodynamiques d’un hydrocarbure pur, cette équation d'état nécessite de connaître la température critique, la pression critique et le facteur acentrique des hydrocarbures. L’équation d'état proposée est utilisée pour effectuer des calculs PVT et d’équilibre vapeur-liquide de différents hydrocarbures purs et de mélanges de fluides. Les résultats sont comparés à ceux obtenus par deux équations d'état cubiques utilisées classiquement. The parameters of the new cubic equation of state are considered temperature dependent. The proposed equation of state is applied for PVT and VLE calculations of different pure hydrocarbons and fluid mixtures. Greek Letters α, β ε, γ, δ ρlexp ρlcal η ηmax φ Ωp, Ωd reduced temperature function of the new EOS parameters of Equation (3) experimental liquid density calculated liquid density packing fraction maximum packing fraction (MPF) fugacity coefficient weighting parameters

INTRODUCTION
PRESENTATION OF THE NEW EQUATION OF STATE
RESULTS
CONCLUSIONS
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call