Title of article :
The simultaneous representation of dielectric constant, volume and activity coefficients using an electrolyte equation of state
Author/Authors :
Inchekel، نويسنده , , Radia and de Hemptinne، نويسنده , , Jean-Charles and Fürst، نويسنده , , Walter، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
9
From page :
19
To page :
27
Abstract :
In this work, we propose an extension to electrolyte systems of the Cubic Plus Association (CPA) equation of state. The effect of the ionic charge is accounted for by a Born term, and a Mean Spherical Approximation (MSA) contribution for the coulombic interactions between permanent charges. The effect of the Born term on the excess properties is directly related to the change of the dielectric constant with concentration. aper analyses the capacity of the model to represent the properties of aqueous solutions by comparison with experimental data of apparent molar volume and activity coefficients. In a first stage, we discuss the contribution of each term based on the water–NaCl and water–CaCl2 systems. Simoninʹs model for the dielectric constant is found most convenient for describing the dielectric constant. In a second stage, the model is extended with success to a set of ten different salts in water.
Keywords :
electrolytes , Born , dielectric constant , equation of state , MSA , CPA
Journal title :
Fluid Phase Equilibria
Serial Year :
2008
Journal title :
Fluid Phase Equilibria
Record number :
1987169
Link To Document :
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