Thermodynamic stability of fluid-fluid phase separation in binary athermal mixtures: the role of nonadditivity

The Journal of Physical Chemistry. B
Giuseppe PellicaneP V Giaquinta

Abstract

We studied the thermodynamic stability of fluid-fluid phase separation in binary nonadditive mixtures of hard-spheres for moderate size ratios. We are interested in elucidating the role played by small amounts of nonadditivity in determining the stability of fluid-fluid phase separation with respect to the fluid-solid phase transition. The demixing curves are built in the framework of the modified-hypernetted chain and of the Rogers-Young integral equation theories through the calculation of the Gibbs free energy. We also evaluated fluid-fluid phase equilibria within a first-order thermodynamic perturbation theory applied to an effective one-component potential obtained by integrating out the degrees of freedom of the small spheres. A qualitative agreement emerges between the two different approaches. We also addressed the determination of the freezing line by applying the first-order thermodynamic perturbation theory to the effective interaction between large spheres. Our results suggest that for intermediate size ratios a modest amount of nonadditivity, smaller than earlier thought, can be sufficient to drive the fluid-fluid critical point into the thermodinamically stable region of the phase diagram. These findings could be ...Continue Reading

References

Jun 22, 1992·Physical Review Letters·P BartlettP N Pusey
Oct 25, 2000·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·A A LouisJ P Hansen
Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·R RothA A Louis
Apr 24, 2002·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·M DijkstraR Evans
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·D CostaG Kahl
Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·G PellicaneL L Lee
May 28, 2005·The Journal of Chemical Physics·G PastoreF Colonna

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Citations

May 16, 2012·The Journal of Chemical Physics·Franz SaijaMariano López de Haro
Aug 3, 2014·The Journal of Chemical Physics·Giuseppe Pellicane, Owen D Pandaram
Jul 28, 2016·The Journal of Chemical Physics·Samuel D Finlayson, Paul Bartlett
Mar 19, 2008·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Giuseppe PellicaneHartmut Löwen
Oct 21, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·E Allahyarov, H Löwen
Mar 9, 2011·Physical Chemistry Chemical Physics : PCCP·Juliana Angeiras Batista da SilvaRicardo Luiz Longo
May 19, 2009·Chemical Reviews·Shiqi Zhou, J R Solana
Apr 10, 2007·The Journal of Physical Chemistry. B·G PellicaneF Saija

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