|
چکیده
|
New experimental PρT data of three glycols ethers, namely, 2-ethoxyethanol, 2-propoxyethanol and 2- butoxyethanol were measured in a wide range of temperatures (293.15 to 413.15) K and pressures (0.1 to 30) MPa with a vibrating-tube densimeter. The experimental PρT data were correlated with the modified Tait equation. The study is completed with modelling in terms of the simplified perturbed-chain statistical associating fluid theory (sPC-SAFT) equation of state. The pure compound parameters of the sPC-SAFT equation are generally determined by fitting the equation to experimental saturated vapor pressure and liquid density. In this work, new correlation by minimizing the total objective function of temperature, pressure and density simultaneously were developed to estimate the sPC-SAFT equation with two association scheme parameters of three glycols ethers with using PρT data. The validity of the parameters and the employed association scheme were tested by prdiction of derivative properties. All correlated/predicted results were compared wirth experimental literature data. The obtained results showed that the sPC-SAFT equation of state along with the proposed correlations, presents good results for modelling of these glycols ethers.
|