In this work, the COSMO-SAC-Phi\u00a0equation of state\u00a0[Fluid Phase Equilib. 488 (2019) 13\u201326] is refined by the introduction of a new equation to describe dispersive effects. The proposed modification is inspired by the well-known rules of consistency for \u03b1-functions, used in\u00a0cubic equations\u00a0of state. The results for 38 representative compounds have shown that the proposed modification is able to improve the correlation of\u00a0pure\u00a0compound experimental data of\u00a0saturation pressures\u00a0and saturated liquid volume, with average deviations of 0.96% and 0.73%, respectively. Densities of pure compounds under conditions beyond the\u00a0saturation region\u00a0were also well predicted. Vapor-liquid equilibrium predictions of\u00a0binary mixtures\u00a0demonstrated, for most cases, that the modified equation was superior to the original COSMO-SAC-Phi model, PSRK, and Soave-Redlich-Kwong with the classical van der Waals mixing rule. The modified model was also able to produce very good predictions for liquid-liquid equilibrium, being similar to UNIFAC-LLE at low temperatures, but exhibiting a much better performance at higher temperatures (and pressures).<\/p>\n\n\n\n
Access the full article on this link.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" In this work, the COSMO-SAC-Phi\u00a0equation of state\u00a0[Fluid Phase Equilib. 488 (2019) 13\u201326] is refined by the introduction of a new equation to describe dispersive effects. The proposed modification is inspired by the well-known rules of consistency for \u03b1-functions, used in\u00a0cubic…
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