Polymeric nanofiltration of binary water–alcohol mixtures: Influence of feed composition and membrane properties on permeability and rejection

Geens, Jeroen; Peeters, Kurt M. U.; Bruggen, Bart Van der; Vandecasteele, Carlo

doi:10.1016/j.memsci.2005.01.039

Cited by 115 publications

(50 citation statements)

References 27 publications

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“…[23][24][25]130 Compared with the solvent polarity, the solvent viscosity is generally believed to be a predominate factor that affects the solvent permeability. 139 All of the solvent transfer models mentioned above illustrate that the solvent permeability decreases dramatically with increased the solvent viscosity. 24,125,128,129 Stamatialis et al 140 found a valid linear correlation between the solvent permeability and (membrane) swelling/(solvent) viscosity ratio.…”

Section: The Influencing Factors Of Solvent Transfer Through Polymerimentioning

confidence: 99%

Recent Advances in Polymeric Solvent‐Resistant Nanofiltration Membranes

et al. 2014

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When considering energy consumption and environmental issues, solvent-resistant nanofiltration (SRNF) based on polymeric materials emerges as a process for substituting conventional separation processes of organic solutions, such as distillation, which consume high amounts of energy. Because SRNF does not involve phase transition, this process can potentially decrease the energy consumption and solvent waste and increase the yield of active components. Such improvements could significantly benefit a number of fields, such as pharmaceutical manufacturing and catalysis recovery, among others. Therefore, SRNF has gained a lot of attention since the recent introduction of solvent-stable polymeric materials in the manufacture of nanofiltration membranes. The membrane materials and the membrane structures depending on the fabrication methods determine the separation performance of polymeric SRNF membranes. Therefore, this article gives a comprehensive overview of the current state-of-art technologies of generating membrane materials and corresponding fabrication methods for SRNF membranes made from polymeric materials expected to provide the most benefit. The transport mechanisms and the corresponding models of SRNF membranes in organic media are also reviewed to better understand the mass transfer process. Various SRNF applications, such as in pharmaceutical and catalyst, among others, are also discussed. Finally, the difficulties and future research directions to overcome the challenges faced by SRNF processes are proposed. C

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Section: The Influencing Factors Of Solvent Transfer Through Polymerimentioning

confidence: 99%

Recent Advances in Polymeric Solvent‐Resistant Nanofiltration Membranes

et al. 2014

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“…From the literature, [7,12,17,20,36,37] it can be concluded that polarity differences are more important than other membrane and solvent parameters, such as pore size, viscosity, surface tension, and molar volume, in solvent-related membrane applications. This is confirmed by the flux behavior for different systems.…”

Section: Effect Of Dielectric Constantmentioning

confidence: 99%

“…The membranes with the smallest pore size have a large effect from polarity as an interaction parameter. [36] The effect of the dielectric constant on solvent flux appears to be relatively more important than the solubility parameter. This is possibly due to the noticeable effect of the dielectric constant on diffusion of the permeating flux.…”

Section: Effect Of Dielectric Constantmentioning

confidence: 99%

“…A high surface tension corresponds to a hydrophilic surface, whereas low values for the surface tension are characteristic of hydrophobic materials. The surface tension of the membrane has been used to describe repulsion and attraction forces between solvents and polymers [7,12,36] at the membrane/solvent interface. Taking into account the assumption that both the solvent viscosity and the surface tension influence the solvent flux, [7,12] it is logical that paraffins such as nhexane, which have the lowest viscosity and surface tension of the solvents used (and thus the smallest difference in surface tension with the hydrophobic membrane), have a significantly higher permeation ability than the other solvents.…”

Section: Effect Of Surface Tensionmentioning

confidence: 99%

“…Transport in NF membranes is thought to mainly occur by convection, [12,36,39,40] and thus transport of momentum, which implies that solvent viscosity strongly affects the total permeate flux. According to Darcy's law, convective transport is inversely proportional to the solvent viscosity.…”

Section: Effect Of Solvent Viscositymentioning

confidence: 99%

See 2 more Smart Citations

Physicochemical Characterization of Transport in Nanosized Membrane Structures

Darvishmanesh¹,

Degrève²,

Bruggen³

2010

ChemPhysChem

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The understanding of polymer-solvent interactions is highly important for the development of tailored membrane manufacturing procedures and for the prediction of membrane performance from transport mechanisms. This study examines the permeation performance of organic solvents through state-of-the-art polyimide membranes (STARMEM, Membrane Extraction Technology Ltd.). Solvents are systematically selected to allow investigation of the effects of key physicochemical transport parameters by keeping constant all other parameters thought to be relevant. The effect of the solubility parameter, polarity (dielectric constant), surface tension, and viscosity are studied in detail. Dead-end permeation experiments are carried out at 20 bar with STARMEM 122 and STARMEM 240 membranes. Results for the selected solvents show higher permeation rates for ketones over alcohols and aromatics as well as for acids. It is suggested that the viscosity and polarity have a greater influence than the other parameters. The effect of solvent molar volume is also investigated. Transport of solvents with high molar volume, independent of their polarity and compatibility with the membrane material, is slower in all cases than for solvents with smaller molar volume. The solubility parameter does not show any significant effect on transport phenomena.

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Nanofiltration

Bruggen

Geens

2008

Advanced Membrane Technology and Applications

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Polymeric nanofiltration of binary water–alcohol mixtures: Influence of feed composition and membrane properties on permeability and rejection

Cited by 115 publications

References 27 publications

Recent Advances in Polymeric Solvent‐Resistant Nanofiltration Membranes

Recent Advances in Polymeric Solvent‐Resistant Nanofiltration Membranes

Physicochemical Characterization of Transport in Nanosized Membrane Structures

Nanofiltration

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