Generalized saturated liquid density prediction method for pure compounds and multi-component mixtures

A generalized saturated liquid density equation in conjunction with the Predictive-Soave–Redlich–Kwong (PSRK) equation of state has been developed. This equation uses the Mathias and Copeman temperature dependent term in addition to the critical temperature, critical density and dipole moment for prediction of saturated liquid density of pure compounds. The average absolute error for prediction of the saturated liquid density of 4745 experimental data points for hydrocarbons, halogenated paraffins, liquefied inorganic gases, alcohols, ethers and acids was 0.91%. The equation was then used with the equation and mixing rules of Nasrifar and Moshfeghian to predict the saturated liquid density of multi-component mixtures. The average absolute error for prediction of saturated liquid density of 87 multi-component systems containing nitrogen, hydrocarbons, alcohols, H2S, CO2 and halogenated paraffins was 1.11% for 1407 experimental data points.