Evaluation of the local composition model for VLE of binary mixtures of triethylene glycol with methane, water and benzene

Authors

  • Eduardo Cartaya,

    1. School of Chemical Engineering and Materials Science, University of Oklahoma, Norman, Oklahoma 73019, U.S.A.
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  • Steve Harmon,

    1. School of Chemical Engineering and Materials Science, University of Oklahoma, Norman, Oklahoma 73019, U.S.A.
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  • Kenneth E. Starling

    Corresponding author
    1. School of Chemical Engineering and Materials Science, University of Oklahoma, Norman, Oklahoma 73019, U.S.A.
    • School of Chemical Engineering and Materials Science, University of Oklahoma, Norman, Oklahoma 73019, U.S.A.
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Abstract

This work evaluated the predictive accuracy of the local composition model (LCM) formulation developed by Li et al. (1986) for four binary, vapor-liquid equilibria (VLE) mixtures. The four components comprising these mixtures were benzene, triethylene glycol (TEG), water and methane, while the mixtures examined in this work were the benzene-TEG, water-TEG, methane-TEG and methane-benzene systems. The Khan-Chung-Lee-Starling (KCLS) equation of state developed by Chung et al. (1984) was used with the LCM to predict the VLE behavior of these systems. The accurate results obtained in this work may be applied to the design of natural gas dehydration processes.

Abstract

On évalue dans ce travail la précision de la formulation du modèle de composition locale (LCM) élaborée par Li et al. (1986) pour quatre mélanges d'équilibre liquide-vapeur (ELV) binaires. Les quatres composants de ces mélanges sont le benzène, le triéthylène glycol (TEG), l'eau et le méthane, tandis que les mélanges examinés ici sont les systèmes benzène-TED, eau-TEG, méthane-TEG et méthane-benzène. On a utilisé l'équation d'état de Khan-Chung-Lee Starling (KCLS) élaborée par Chung et al. (1984) conjointement au LCM afin de prédire le comportement ELV de ces systèmes. Les résultats précis obtenus dans ce travail peuvent ětre appliqués à la conception des procédés de déshydratation de gaz naturel.

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