COMPARATIVE STUDY OF THE THERMODINAMIC PROPERTIS PREDICTION OF POLAR SUBSTANCES WITH RECENT MODELS OF CUBIC STATE EQUATIONS

  • N. Kleiman
  • F. Barragán
  • E. Bazúa
Keywords: equation of state, alpha parameter, vapor-liquid equilibria

Abstract

This paper studies the predictability of the properties of pure polar and non-polar compounds by means of cubic equations of state. Many temperature-dependent models of the alpha function were chosen for comparison. These models are derived from Soave (1972) and Peng-Robinson (1976). Parameters are fitted in with vapor pressure with experimental data. The alpha models were compared for accuracy with vapor pressure, enthalpy of vaporization and the second virial coefficient for 32 compounds. The enthalpy of vaporization and the second virial coefficient calculations are predictive. Mathias’ (1983) modification is introduced for the supercritical region of those equations, which do not have a specific expression. In addition, Most of studied models allow accurate representation of the properties of pure compounds.

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Published
2020-11-12
How to Cite
Kleiman, N., Barragán, F., & Bazúa, E. (2020). COMPARATIVE STUDY OF THE THERMODINAMIC PROPERTIS PREDICTION OF POLAR SUBSTANCES WITH RECENT MODELS OF CUBIC STATE EQUATIONS. Revista Mexicana De Ingeniería Química, 1(3), 119-135. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/2198