Determination of dependence on the temperature of the coupling interaction of the components of propane-normal hexan systems, propane-normal heptan for equation of the state of Peng - Robinson

The aim of this work is to clarify the amendments in the calculation of the state of hydrocarbon systems for the available temperatures of the binary systems “propane-normal hexane”, “propane-normal heptane”. The most optimal values of the coefficients of pairwise interaction of the CPV are obtained. The studies were carried out by calculating the equilibrium phase concentrations from thermodynamic relations, and then comparing them with experimental data for the phase concentrations of the corresponding pairs of substances at various pressures and temperatures.