Effect of pressure on the solid-liquid equilibria of synthetic paraffin mixtures using predictive methods

Khashayar Nasrifar*, Mohammad Fani Kheshty

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The solid-liquid equilibria of paraffin mixtures are studied from low to high pressures. The liquid phase is described by a cubic equation of state. The solid phase is described by solid UNIQUAC and a pressure dependence term resulted from Clapeyron equation. The developed model accurately predicts the wax disappearance temperature of pure, binary and multicomponent paraffin mixtures for wide ranges of temperature, pressure and composition. Further, the model reasonably predicts the amount of wax precipitated and wax composition from low to high temperatures and at any pressure. When compared to other models, the developed model is in better agreement with experimental data in predicting wax disappearance temperature. In predicting wax deposit and composition, the developed model is similar to the well-known models in the literature.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalFluid Phase Equilibria
Issue number1-2
Publication statusPublished - Nov 25 2011


  • Equation of state
  • Pressure effect, UNIQUAC
  • Solid-liquid equilibria
  • Wax formation

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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