New Experimental Data and Modeling of Glymes: Toward the Development of a Predictive Model for Polyethers

Abstract

The design and optimization of industrial processes relies on the availability of robust and accurate models and equations of state (EoSs). Considering the further advancement of the use of soft-SAFT (one version of statistical associating fluid theory) EoS, toward its implementation in industrial processes, a methodology to determine the molecular model and transferable molecular parameters of glymes is discussed herein. In addition to the commonly used vapor pressure and saturated liquid densities, the description of the temperature and pressure effect is improved by including one additional density–pressure and one isothermal compressibility isotherm (both at 323 K) for the molecular parameter optimization. For the guiding of the selection and optimization of the soft-SAFT EoS molecular model and parameters, new high-pressure density data (pρT) and derived properties, such as isothermal compressibility and isobaric thermal expansion, of eight glymes (glycol ethers) have been determined in wide ranges o...