Review of Mass Transfer and Solubility Modeling in Subcritical Water Extraction

In this study, mass transfer and solubility modeling of subcritical water extraction have been investigated. The Methods for estimating solute dissolved in subcritical water include experimental models, Hansen solubility parameters, solubility model based on pure component properties, the modified UNIFAC model, dielectric constant. The existing methods based on solubility data are limited. The solubility data of various solutes include hydrocarbons, essential oil compounds, pesticides, poly-phenolic compounds at high and low boiling point temperatures of water. Knowledge of phase equilibrium, mass transfer rate and solubility data for the design of extraction processes and equipment are important.