AN INTERIM THERMODYNAMIC PROPERTY FORMULATION FOR SUPERCRITICAL n-HEXANE

  • SALAHEDDINE AZZOUZ
    FACULTÉ DES SCIENCES DE L’INGÉNIEUR, DÉPARTEMENT DE MÉCANIQUE, UNIVERSITÉ BADJI MOKHTAR, BP 12, ANNABA 23000, ALGÉRIE
  • AICHA RIZI
    FACULTÉ DES SCIENCES, DÉPARTEMENT DE CHIMIE, UNIVERSITÉ BADJI MOKHTAR, BP 12, ANNABA 23000, ALGÉRIE
  • ANISSA ACIDI
    FACULTÉ DES SCIENCES, DÉPARTEMENT DE CHIMIE, UNIVERSITÉ BADJI MOKHTAR, BP 12, ANNABA 23000, ALGÉRIE
  • AZZEDINE ABBACI
    FACULTÉ DES SCIENCES, DÉPARTEMENT DE CHIMIE, UNIVERSITÉ BADJI MOKHTAR, BP 12, ANNABA 23000, ALGÉRIE

Abstract

Accurate information on the thermodynamic properties of supercritical fluids is highly sought for the chemical technology, especially, supercritical extraction technology. The thermodynamic properties of fluids near the critical region are strongly affected by the presence of fluctuations and therefore, can not be described by conventional equation. We have investigated an interim formulation for the behavior of the thermodynamic properties of n-hexane in the vicinity of the critical region. For this reason we have used the so-called “crossover model” to describe the thermodynamic properties of n-hexane in a wide range of temperatures and densities around the critical point.

Cuvinte cheie

crossover fluctuations n-hexane supercritical thermodynamic properties