A compressed liquid density correlation

A new correlation is developed for calculation of the compressed liquid density of pure compounds and mixtures. This correlation is used together with the Hankinson–Thomson (COSTALD) correlation of saturated liquid density and the Riedel equation for the calculation of vapor pressures. The range of application of this correlation is quite wide; from freezing point temperature to critical point temperature and from saturation pressure to 500 MPa. The average of error for the prediction of the compressed liquid volume of 31 compounds consisting of 3324 experimental data points is 0.77% with −0.24% bias from the experimental data. For mixtures, the average of error for the prediction of the compressed liquid volume of 13 mixtures consisting of 2101 experimental data points is 1% with −0.22% bias from the experimental data. The comparison with other correlations shows that the new correlation is somewhat better and quite reliable to very high pressures.