What does the <scp>NRTL</scp> model look like? Determination of boundaries for different fluid phase equilibrium regions

The adequate correlation of experimental phase equilibrium data by using any thermodynamic model represents a key point for the rigorous design chemical processes. However, this process remains challenging problem, due to high nonlinearity models used and consequent problems convergence. present work analyzes nonrandom two-liquids mode (NRTL) check relation between values binary interaction parameters corresponding equilibria that NRTL can or cannot reproduce. Additionally, in case LLE, empirical equations have been established as function nonrandomness parameter, trajectory different miscibility boundaries observed. These functions be constraints procedure reduce search space guarantee consistency obtained with behavior system under study.