Phase equilibria of nitrobenzene – n-heptane system with TiO2 nanoparticle additives
DOI:
https://doi.org/10.15587/1729-4061.2015.36752Keywords:
nanofluid, liquid-liquid equilibrium, critical lines, nitrobenzene, heptane, titanium dioxideAbstract
Phase behavior of nitrobenzene - n-heptane system under the influence of titanium dioxide nanoparticle additives was considered in the paper. Based on limited experimental data, parameters of one-fluid Peng-Robinson models for a binary mixture were recovered and evaluation of the phase equilibrium shift lines and critical parameters of a binary mixture with titanium oxide nanoparticle additives was performed. At low concentrations of nanoparticles, the II type of phase behavior, for example, of the system under consideration, does not undergo any changes. Recovered cross interaction parameters have allowed to calculate phase equilibria for the base system and predict the phase behavior of nanofluid in a wide range of temperatures and pressures. The shift of the liquid phase separation lines, final critical point and critical lines of the mixture with the titanium oxide nanoparticle additives was first evaluated.
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