The Selectivity Challenge in Organic Solvent Nanofiltration: Membrane and Process Solutions.

Patrizia Marchetti, Ludmila Peeva, Andrew Livingston

Annual review of chemical and biomolecular engineering 2017 Jun 07

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Recent development of organic solvent nanofiltration (OSN) materials has been overwhelmingly directed toward tight membranes with ultrahigh permeance. However, emerging research into OSN applications is suggesting that improved separation selectivity is at least as important as further increases in membrane permeance. Membrane solutions are being proposed to improve selectivity, mostly by exploiting solute/solvent/membrane interactions and by fabricating tailored membranes. Because achieving a perfect separation with a single membrane stage is difficult, process engineering solutions, such as membrane cascades, are also being advocated. Here we review these approaches to the selectivity challenge, and to clarify our analysis, we propose a selectivity figure of merit that is based on the permselectivity between the two solutes undergoing separation as well as the ratio of their molecular weights.

Citation

Patrizia Marchetti, Ludmila Peeva, Andrew Livingston. The Selectivity Challenge in Organic Solvent Nanofiltration: Membrane and Process Solutions. Annual review of chemical and biomolecular engineering. 2017 Jun 07;8:473-497