Separation of binary solvent mixtures with solvent resistant nanofiltration membranes part B: process modeling

Abstract

This part B of a two paper series develops an improved model derived from the classical solution-diffusion model, specifically for solvent separation process in SRNF. Important assumptions for this process from the first part of this work were adopted and only two parameters, i.e. the Hansen solubility parameter and dielectric constant, were integrated in this model. Separation factors of DuraMem™ 150, 200, 300 and MPF-44 fitted well with this new model and that of DuraMem™ 500 and DuraMem™ 900 had a poor correlation, which was consistent with the author's hypotheses. This model provides a new approach to understand solvent separation processes in SRNF, and offers a good breakthrough point for further work in this field.