Binary interaction parameters for nonpolar systems with cubic equations of state: a theoretical approach 1. CO2/hydrocarbons using SRK equation of state

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Abstract

This work shows that, when suitable theoretically based combining rules are used for the cross energy and cross co-volume parameters, cubic equations of state (EoS) with the van der Waals one-fluid mixing rules can adequately represent phase equilibria for the asymmetric CO2/hydrocarbon mixtures. These combining rules lead to semi-theoretical yet simple, meaningful and successful correlations for the interactions parameters Kij (of the cross-energy term) and lij (of the cross volumef term). Unlike previous correlations, the proposed equations relate the interaction parameters only to the pure component co-volume (bi) parameters, meaning that no additional critical volume), besides those required by the EoS itself (the critical temperature Tc, the critical pressure Pc and the acentric factor) are used. Furthermore, the form of the correlations enables us to tune easily the cubic EoS when this is required for the prediction of phase behavior of petroleum fluids. A brief theoretical analysis on the temperature dependency of the Kij interaction parameter is also presented.
Original languageEnglish
JournalFluid Phase Equilibria
Volume102
Issue number1
Pages (from-to)31-60
ISSN0378-3812
DOIs
Publication statusPublished - 1994

Keywords

  • Theory
  • Equation of state
  • Cubic
  • Vapor-liquid equilibria
  • Mixing and combining rules
  • Hydrocarbons

Cite this

@article{0db309b1e1dd45a0b5cf3b2591614a5c,
title = "Binary interaction parameters for nonpolar systems with cubic equations of state: a theoretical approach 1. CO2/hydrocarbons using SRK equation of state",
abstract = "This work shows that, when suitable theoretically based combining rules are used for the cross energy and cross co-volume parameters, cubic equations of state (EoS) with the van der Waals one-fluid mixing rules can adequately represent phase equilibria for the asymmetric CO2/hydrocarbon mixtures. These combining rules lead to semi-theoretical yet simple, meaningful and successful correlations for the interactions parameters Kij (of the cross-energy term) and lij (of the cross volumef term). Unlike previous correlations, the proposed equations relate the interaction parameters only to the pure component co-volume (bi) parameters, meaning that no additional critical volume), besides those required by the EoS itself (the critical temperature Tc, the critical pressure Pc and the acentric factor) are used. Furthermore, the form of the correlations enables us to tune easily the cubic EoS when this is required for the prediction of phase behavior of petroleum fluids. A brief theoretical analysis on the temperature dependency of the Kij interaction parameter is also presented.",
keywords = "Theory, Equation of state, Cubic, Vapor-liquid equilibria, Mixing and combining rules, Hydrocarbons",
author = "Coutinho, {Jo{\~a}o A.P.} and Kontogeorgis, {Georgios M.} and Stenby, {Erling H.} and Stenby, {Erling H.}",
year = "1994",
doi = "10.1016/0378-3812(94)87090-X",
language = "English",
volume = "102",
pages = "31--60",
journal = "Fluid Phase Equilibria",
issn = "0378-3812",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Binary interaction parameters for nonpolar systems with cubic equations of state: a theoretical approach 1. CO2/hydrocarbons using SRK equation of state

AU - Coutinho, João A.P.

AU - Kontogeorgis, Georgios M.

AU - Stenby, Erling H.

AU - Stenby, Erling H.

PY - 1994

Y1 - 1994

N2 - This work shows that, when suitable theoretically based combining rules are used for the cross energy and cross co-volume parameters, cubic equations of state (EoS) with the van der Waals one-fluid mixing rules can adequately represent phase equilibria for the asymmetric CO2/hydrocarbon mixtures. These combining rules lead to semi-theoretical yet simple, meaningful and successful correlations for the interactions parameters Kij (of the cross-energy term) and lij (of the cross volumef term). Unlike previous correlations, the proposed equations relate the interaction parameters only to the pure component co-volume (bi) parameters, meaning that no additional critical volume), besides those required by the EoS itself (the critical temperature Tc, the critical pressure Pc and the acentric factor) are used. Furthermore, the form of the correlations enables us to tune easily the cubic EoS when this is required for the prediction of phase behavior of petroleum fluids. A brief theoretical analysis on the temperature dependency of the Kij interaction parameter is also presented.

AB - This work shows that, when suitable theoretically based combining rules are used for the cross energy and cross co-volume parameters, cubic equations of state (EoS) with the van der Waals one-fluid mixing rules can adequately represent phase equilibria for the asymmetric CO2/hydrocarbon mixtures. These combining rules lead to semi-theoretical yet simple, meaningful and successful correlations for the interactions parameters Kij (of the cross-energy term) and lij (of the cross volumef term). Unlike previous correlations, the proposed equations relate the interaction parameters only to the pure component co-volume (bi) parameters, meaning that no additional critical volume), besides those required by the EoS itself (the critical temperature Tc, the critical pressure Pc and the acentric factor) are used. Furthermore, the form of the correlations enables us to tune easily the cubic EoS when this is required for the prediction of phase behavior of petroleum fluids. A brief theoretical analysis on the temperature dependency of the Kij interaction parameter is also presented.

KW - Theory

KW - Equation of state

KW - Cubic

KW - Vapor-liquid equilibria

KW - Mixing and combining rules

KW - Hydrocarbons

U2 - 10.1016/0378-3812(94)87090-X

DO - 10.1016/0378-3812(94)87090-X

M3 - Journal article

VL - 102

SP - 31

EP - 60

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

SN - 0378-3812

IS - 1

ER -