Thermodynamic properties of ternary fluid mixtures from the improved perturbation theory and van der Waals one-fluid theory—II. Real mixtures

✍ Scribed by K. Fotouh; K. Shukla

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 361 KB
• Volume: 51
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(96)00326-0

✦ Synopsis

In this paper, a previously developed first-order hard sphere perturbation theory of a ternary fluid mixture (Fotouh and Shukla, 1996, Chem. Enyn9 Sci. 51, 49234931) is applied to predict excess properties of a real ternary fluid mixture using a theoretically consistent combination rule. We consider a ternary fluid mixture N2/Ar/CH4, for which experimental data for excess properties are available and which can be modeled adequately using the simple Lennard-Jones potential function. Comparisons of theoretical results with experimental data show a very good performance of perturbation theory for different pressures and compositions of the mixture. Also, we checked the accuracy of a recent form of van der Waals one-fluid theory based on the most accurate equation of state for pure Lennard Jones fluids. Van der Waals one-fluid theory is found to be equally reliable in describing excess properties of such a moderately nonideal mixture.