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

Annual Review of Chemical and Biomolecular Engineering
Patrizia MarchettiAndrew G Livingston

Abstract

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.

References

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Citations

Dec 24, 2018·Angewandte Chemie·Guanghui ZhuRyan P Lively
Feb 23, 2017·Nature Materials·Ryan P Lively, David S Sholl
Apr 2, 2020·Annual Review of Chemical and Biomolecular Engineering·Saikat DasWei Wang
Nov 9, 2018·Frontiers in Chemistry·Michele Galizia, Kelly P Bye
Apr 4, 2021·Membranes·Seungmin LeeSang-Hee Park
Apr 20, 2018·ACS Applied Materials & Interfaces·Fan FeiChristopher F Blanford

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Methods Mentioned

BETA
column chromatography

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