Analysis of single-stage nonequilibrium separation process problems

Equations constituting the nonequilibrium rate-based separation process pro blem involving binary and ternary mixtures were analyzed. Multiplicity occu rring in the nonequilibrium stage resulted front multiplicity faking place in the equilibrium calculations at the interface. This is achieved by demon strating a one-to-one correspondence between the bulk and interface composi tions in a nonequilibrium stage. The analysis of the film model for the mas s-transfer problem where the fluxes are obtained using the Maxwell-Stefan e quations showed solution uniqueness for this equation sec. It also showed t hat the imposition of the mass-transfer equations does nothing to cause add itional multiplicities.