An analytical expression for the vapor pressure of ionic liquids based on an equation of state

José O. Valderrama; Luis A. Forero

doi:10.1016/j.fluid.2011.12.021

An analytical expression for the vapor pressure of ionic liquids based on an equation of state

José O. Valderrama, Luis A. Forero

Research output: Contribution to journal › Article in an indexed scientific journal › peer-review

31 Scopus citations

Abstract

An analytical expression for the vapor pressure of ionic liquids based on the Peng-Robinson equation of state is proposed. The method uses the concept of zero-pressure fugacity previously presented in the literature and that has been found to work well in the range of low vapor pressures (lower than 0.1. Pa), where the values of vapor pressure of ionic liquids, up to moderate temperatures, are found. The parameters of the equation of state are generalized in terms of ionic liquid properties and results are compared with experimental data, showing average absolute deviations below 8%. The advantage of the proposed analytical expression is its solid thermodynamic foundation, the generalization of the model parameters, and its acceptable accuracy for engineering calculations.

Original language	English
Pages (from-to)	77-83
Number of pages	7
Journal	Fluid Phase Equilibria
Volume	317
DOIs	https://doi.org/10.1016/j.fluid.2011.12.021
State	Published - 15 Mar 2012

Bibliographical note

Funding Information:
The authors thank the support of the Direction of Research of the University of La Serena and of the Center for Technological Information of La Serena-Chile, for special support. J.O.V. thanks the National Council for Scientific and Technological Research (CONICYT) for its research grant FONDECYT 1120162 . L.A.F. thanks the Administrative Department of Science, Technology and Innovation (Colciencias-Colombia) , for financial support through the program National Doctorates-Bicentennial Generation 2009.

Keywords

Equations of state
Ionic liquids
Vapor pressure
Zero-pressure fugacity

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10.1016/j.fluid.2011.12.021

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title = "An analytical expression for the vapor pressure of ionic liquids based on an equation of state",

abstract = "An analytical expression for the vapor pressure of ionic liquids based on the Peng-Robinson equation of state is proposed. The method uses the concept of zero-pressure fugacity previously presented in the literature and that has been found to work well in the range of low vapor pressures (lower than 0.1. Pa), where the values of vapor pressure of ionic liquids, up to moderate temperatures, are found. The parameters of the equation of state are generalized in terms of ionic liquid properties and results are compared with experimental data, showing average absolute deviations below 8%. The advantage of the proposed analytical expression is its solid thermodynamic foundation, the generalization of the model parameters, and its acceptable accuracy for engineering calculations.",

keywords = "Equations of state, Ionic liquids, Vapor pressure, Zero-pressure fugacity",

author = "Valderrama, {Jos{\'e} O.} and Forero, {Luis A.}",

note = "Funding Information: The authors thank the support of the Direction of Research of the University of La Serena and of the Center for Technological Information of La Serena-Chile, for special support. J.O.V. thanks the National Council for Scientific and Technological Research (CONICYT) for its research grant FONDECYT 1120162 . L.A.F. thanks the Administrative Department of Science, Technology and Innovation (Colciencias-Colombia) , for financial support through the program National Doctorates-Bicentennial Generation 2009.",

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doi = "10.1016/j.fluid.2011.12.021",

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T1 - An analytical expression for the vapor pressure of ionic liquids based on an equation of state

AU - Valderrama, José O.

AU - Forero, Luis A.

N1 - Funding Information: The authors thank the support of the Direction of Research of the University of La Serena and of the Center for Technological Information of La Serena-Chile, for special support. J.O.V. thanks the National Council for Scientific and Technological Research (CONICYT) for its research grant FONDECYT 1120162 . L.A.F. thanks the Administrative Department of Science, Technology and Innovation (Colciencias-Colombia) , for financial support through the program National Doctorates-Bicentennial Generation 2009.

PY - 2012/3/15

Y1 - 2012/3/15

N2 - An analytical expression for the vapor pressure of ionic liquids based on the Peng-Robinson equation of state is proposed. The method uses the concept of zero-pressure fugacity previously presented in the literature and that has been found to work well in the range of low vapor pressures (lower than 0.1. Pa), where the values of vapor pressure of ionic liquids, up to moderate temperatures, are found. The parameters of the equation of state are generalized in terms of ionic liquid properties and results are compared with experimental data, showing average absolute deviations below 8%. The advantage of the proposed analytical expression is its solid thermodynamic foundation, the generalization of the model parameters, and its acceptable accuracy for engineering calculations.

AB - An analytical expression for the vapor pressure of ionic liquids based on the Peng-Robinson equation of state is proposed. The method uses the concept of zero-pressure fugacity previously presented in the literature and that has been found to work well in the range of low vapor pressures (lower than 0.1. Pa), where the values of vapor pressure of ionic liquids, up to moderate temperatures, are found. The parameters of the equation of state are generalized in terms of ionic liquid properties and results are compared with experimental data, showing average absolute deviations below 8%. The advantage of the proposed analytical expression is its solid thermodynamic foundation, the generalization of the model parameters, and its acceptable accuracy for engineering calculations.

KW - Equations of state

KW - Ionic liquids

KW - Vapor pressure

KW - Zero-pressure fugacity

UR - http://www.scopus.com/inward/record.url?scp=84855998902&partnerID=8YFLogxK

U2 - 10.1016/j.fluid.2011.12.021

DO - 10.1016/j.fluid.2011.12.021

M3 - Artículo en revista científica indexada

AN - SCOPUS:84855998902

SN - 0378-3812

VL - 317

SP - 77

EP - 83

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

ER -

An analytical expression for the vapor pressure of ionic liquids based on an equation of state

Abstract

Bibliographical note

Keywords

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