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Critical properties prediction based on a quartic equation of state

✍ Scribed by Lian-yun Zang; Qing-li Zhu; Zhi Yun


Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
131 KB
Volume
88
Category
Article
ISSN
0008-4034

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✦ Synopsis


Abstract

A quartic equation of state (EOS) [Yun et al., Fluid Phase Equilibr. 2001; 187–188: 275–298] is used for predicting critical properties of pure substances. Parameters in the EOS are rewritten as functions of temperature (T in K), and there are totally eleven substance‐specific constants in the functions for each substance. Data of few experimental points including saturated vapour pressure, saturated liquid molar volume and evaporation enthalpy at some temperatures are required in this study to determine the substance‐specific constants in the EOS, while the knowledge of molecular structure is not necessary.

Une équation d'état quartique (Yun et coll., «A new quartic equation of state,» Fluid Phase Equilib 187–188, 275–298 (2001)) est utilisée pour prédire les propriétés critiques des substances pures. Les paramètres de l'équation d'état sont réécrits comme des fonctions de la température (T, en K) et il y a un total de onze constantes propres aux substances dans les fonctions pour chaque substance. Les données de quelques points expérimentaux comprenant la pression de vapeur saturante, le volume molaire de la solution saturée et l'enthalpie d'évaporation à certaines températures sont requises dans cette étude dans le but de déterminer les constantes propres aux substances dans l'équation d'état, alors que la connaissance de la structure moléculaire n'est pas nécessaire. Can. J. Chem. Eng. © 2010 Canadian Society for Chemical Engineering


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