Predictive membrane transport models for Organic Solvent Nanofiltration: How complex do we need to be?

Roll-to-roll dip coating of three different PIMs for Organic Solvent Nanofiltration

“…On switching from heptane to toluene, the aromatic stability of the three different PIMs can be further studied by obtaining the permeability coefficient of each specie within the mixture. For this purpose, the solution diffusion model is adequate for analysis of the transport mechanism [42], given by:…”

Performance of spiral-wound membrane modules in organic solvent nanofiltration – Fluid dynamics and mass transfer characteristics

“…Marchetti and Livingston [25] reported a systematic comparison of the different membrane transport models using selected experimental data for various solvents and solutes through four commercial OSN membranes (DuraMem s 200, DuraMem s 500, PuraMem s 280 and PuraMem s S600). They concluded that solution-diffusion based models give a better description of permeation through flexible chain glassy membranes and rubbery membranes than pore flow based models.…”

“…The subscripts P , F and FM refer to the permeate side, the feed side and the feed side membrane-liquid interface, respective. The membranes used in this study consist of a rubbery separation layer cast on an ultrafiltration support, and belong therefore to the class of membranes characterised by a solution-diffusion transport mechanism, according to Marchetti and Livingston [25]. In order to account for mass transfer limitations and thermodynamic non-ideality of the solutions, Eqs.…”

“…OSN polymeric membranes can compact over time and pressure, as a consequence of their more or less open structure and crosslinking degree [25]. In order to understand the transport through the membranes in this study, it is important to check whether any irreversible compaction occurs over pressure and time.…”

Compatibility study of nanofiltration and reverse osmosis membranes with 1-cyclohexylpiperidenium bicarbonate solutions

“…A membrane process is viable only when the membrane survives in terms of maintaining its selectivity and permeability, usually in excess of hundreds of hours of operation at specified or variable operating conditions[25]. NF membranes were chosen for their manufacturer-rated chemical resistivity in terms of pH and temperature as well as higher permeance in comparison to the RO counterparts at much lower operating pressure regimes[26][27][28][29][30]. Organic solvent nanofiltration (OSN) is a maturing membrane-based separation technology that allows discrimination between molecules in the range of approximately 100-2000 Da in organic media (CHP 167 Da and CHP H 2 CO 3 229 Da).…”