Compressed Liquid Densities for Binary Mixtures at Temperatures from ۲۸۰- ۴۴۰K at Pressures up to ۲۰۰ MPa

A method for predicting liquid densities of binary mixtures from heat of vaporization and liquid densityat boiling point temperature (ΔHvap and n b ρ ) as scaling constants, is presented. B۲(T) follows a promisingcorresponding-states principle. Calculation of α(T) and b(T), the two other temperature-dependentconstants of the equation of state, are made possible by scaling. As a result ΔHvap and n b ρ are sufficient fordetermination of thermophysical properties of liquid mixtures. We applied the procedure to predict liquiddensities of (x۱ n-butane + x۲ isobutane) at compressed state with temperature range from ۲۸۰ to ۴۴۰ K andpressures up to ۲۰۰ MPa. The experimental liquid densities were correlated satisfactory with our procedureand the results are within ۵%.

کلیدواژه ها:

Equation of state ، Liquid Densities ، Scaling Constants