LrgpV1, Main, Exploration, bibRecord, 001B74

Equation of state associated with activity coefficient models to predict low and high pressure vapor–liquid equilibria

Identifieur interne : 001B74 ( Main/Exploration ); précédent : 001B73; suivant : 001B75

Equation of state associated with activity coefficient models to predict low and high pressure vapor–liquid equilibria

Auteurs : Otilio Hernández-Garduza [Mexique] ; Fernando Garc A-Sánchez [Mexique] ; Evelyne Neau [France] ; Marek Rogalski [France]

Source :

Chemical Engineering Journal [ 1385-8947 ] ; 2000.

RBID : ISTEX:06B1ABBEA839AA932C54D64080E4762115A5D836

Descripteurs français

Pascal (Inist)
- Acétone, Benzène, Coefficient activité, Eau, Effet pression, Effet température, Equation état, Equilibre liquide vapeur, Equilibre phase, Ethanol, Modèle thermodynamique, Méthanol, Propan-2-ol, Propriété thermodynamique, Système binaire, Système ternaire.
Wicri :
- topic : Eau, Méthanol.

English descriptors

Abstract

Abstract: A simple and thermodynamically consistent method is presented to establish an equation of state for mixtures by using activity coefficient model parameters. All current solution models such as NRTL, van Laar, UNIFAC, or any other thermodynamic model can be used. The main feature of the method presented is that only a single scaling factor value determined at a given reference temperature is required to predict the vapor–liquid equilibria in a wide range of temperature and pressure. The performance of the method is tested on the prediction of the vapor–liquid equilibria at low, moderate, and high pressures for six binary systems (methanol−benzene, acetone−water, methanol−acetone, methanol−water, ethanol−water, and 2-propanol−water) and a ternary system (acetone−water−methanol). For comparison, vapor–liquid equilibrium calculations were carried out with the Wong and Sandler method by using the PRSV equation of state associated with the van Laar and scaling factors. On the whole, it is found that at high pressures both methods give similar predictions but at low pressures the proposed method gives sometimes better results than that of Wong and Sandler method.

Url:

https://api.istex.fr/document/06B1ABBEA839AA932C54D64080E4762115A5D836/fulltext/pdf

DOI: 10.1016/S1385-8947(00)00138-8

Affiliations:

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acetone</term>
<term>Activity coefficient</term>
<term>Activity coefficient model</term>
<term>Activity models</term>
<term>Activity parameters</term>
<term>Benzene</term>
<term>Binary</term>
<term>Binary mixtures</term>
<term>Binary system</term>
<term>Carbon dioxide</term>
<term>Chem</term>
<term>Chemical engineering journal</term>
<term>Chemistry data series</term>
<term>Compressibility</term>
<term>Compressibility factor</term>
<term>Equation of state</term>
<term>Equations of state</term>
<term>Equilibrium</term>
<term>Equilibrium calculations</term>
<term>Equilibrium data collection</term>
<term>Equilibrium deviations</term>
<term>Ethanol</term>
<term>Excess functions</term>
<term>Excess gibbs</term>
<term>Experimental data</term>
<term>Fluid phase equilibria</term>
<term>Fraction function</term>
<term>Gmehling</term>
<term>Helmholtz</term>
<term>Hern</term>
<term>High pressures</term>
<term>High temperatures</term>
<term>Laar</term>
<term>Laar activity model</term>
<term>Laar model</term>
<term>Liquid vapor equilibrium</term>
<term>Methanol</term>
<term>Nrtl</term>
<term>Nrtl model</term>
<term>Nrtl models</term>
<term>Parameter</term>
<term>Phase equilibrium</term>
<term>Phys</term>
<term>Prcrp</term>
<term>Prcrp equation</term>
<term>Pressure effect</term>
<term>Pressure reference</term>
<term>Reference temperature</term>
<term>Same temperature</term>
<term>Sandler</term>
<term>Sandler method</term>
<term>Scaling factor</term>
<term>Temperature effect</term>
<term>Ternary system</term>
<term>Thermodynamic model</term>
<term>Thermodynamic properties</term>
<term>Unifac</term>
<term>Unifac model</term>
<term>Vapor mole fractions</term>
<term>Vapor pressures</term>
<term>Vapor–liquid equilibria</term>
<term>Water</term>
<term>Wong</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Acétone</term>
<term>Benzène</term>
<term>Coefficient activité</term>
<term>Eau</term>
<term>Effet pression</term>
<term>Effet température</term>
<term>Equation état</term>
<term>Equilibre liquide vapeur</term>
<term>Equilibre phase</term>
<term>Ethanol</term>
<term>Modèle thermodynamique</term>
<term>Méthanol</term>
<term>Propan-2-ol</term>
<term>Propriété thermodynamique</term>
<term>Système binaire</term>
<term>Système ternaire</term>
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<term>Activity parameters</term>
<term>Binary</term>
<term>Binary mixtures</term>
<term>Carbon dioxide</term>
<term>Chem</term>
<term>Chemical engineering journal</term>
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<term>Compressibility factor</term>
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<term>Equilibrium deviations</term>
<term>Excess functions</term>
<term>Excess gibbs</term>
<term>Experimental data</term>
<term>Fluid phase equilibria</term>
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<term>Helmholtz</term>
<term>Hern</term>
<term>High pressures</term>
<term>High temperatures</term>
<term>Laar</term>
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<term>Laar model</term>
<term>Nrtl</term>
<term>Nrtl model</term>
<term>Nrtl models</term>
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<term>Phys</term>
<term>Prcrp</term>
<term>Prcrp equation</term>
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<term>Reference temperature</term>
<term>Same temperature</term>
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<term>Sandler method</term>
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<term>Vapor pressures</term>
<term>Wong</term>
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<front><div type="abstract" xml:lang="en">Abstract: A simple and thermodynamically consistent method is presented to establish an equation of state for mixtures by using activity coefficient model parameters. All current solution models such as NRTL, van Laar, UNIFAC, or any other thermodynamic model can be used. The main feature of the method presented is that only a single scaling factor value determined at a given reference temperature is required to predict the vapor–liquid equilibria in a wide range of temperature and pressure. The performance of the method is tested on the prediction of the vapor–liquid equilibria at low, moderate, and high pressures for six binary systems (methanol−benzene, acetone−water, methanol−acetone, methanol−water, ethanol−water, and 2-propanol−water) and a ternary system (acetone−water−methanol). For comparison, vapor–liquid equilibrium calculations were carried out with the Wong and Sandler method by using the PRSV equation of state associated with the van Laar and scaling factors. On the whole, it is found that at high pressures both methods give similar predictions but at low pressures the proposed method gives sometimes better results than that of Wong and Sandler method.</div>
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Equation of state associated with activity coefficient models to predict low and high pressure vapor–liquid equilibria

Equation of state associated with activity coefficient models to predict low and high pressure vapor–liquid equilibria

Source :

Descripteurs français

English descriptors

Abstract

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