Sattar Mahmoudi Asl - Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
Hosseinali Zarei - Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran

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 witha vibrating-tube densimeter. The experimental PρT data were correlated with the modified Tait equation. The study iscompleted 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 theequation to experimental saturated vapour pressure and liquid density. In this work, new correlation by minimizing thetotal objective function of temperature, pressure and density simultaneously were developed to estimate the sPC-SAFTequation with two association scheme parameters of three glycols ethers with using PρT data. The validity of theparameters and the employed association scheme were tested by prediction of derivative properties. Allcorrelated/predicted results were compared with experimental literature data. The obtained results showed that the sPCSAFTequation of state along with the proposed correlations, presents good results for modelling of these glycolsethers.

2-Alkoxyethanol; Density; High Pressure; sPC-SAFT