Visualization and modelling of the polarization layer and a reversible adsorption process in PEG-10000 dead-end ultrafiltration

Fernández-Sempere, J.; Ruiz-Beviá, F.; García-Algado, P.; Salcedo‐Díaz, Raquel

doi:10.1016/j.memsci.2009.06.046

Cited by 23 publications

(25 citation statements)

References 35 publications

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“…Digital Holographic Interferometry (DHI) has been used in this research and was previously applied to the study of the CP layer [22,23]. It is an interferometric technique very similar to classical Holographic Interferometry previously used [24][25][26][27] but replacing the holographic plate, which needs to be photographically developed, by the CCD chip of a video camera [28]. The interferometric techniques are based in the appearance of interference fringes related to changes in the refractive index of an object where a laser beam has passed through.…”

Section: Introductionmentioning

confidence: 99%

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Salcedo‐Díaz

García-Algado

Garcia‐Rodriguez

et al. 2014

Journal of Membrane Science

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The evolution of the concentration polarization layer during crossflow reverse osmosis in a slit channel has been studied. Digital Holographic Interferometry allows visualizing the polarization layer as an interference fringe pattern. An especial module with four windows has been designed to see the development of the polarization layer along the membrane channel. Several experiments with a constant transmembrane pressure of 6 bar, three different feed concentrations (3, 6 and 9 kg/m 3 ) and three different Re (13, 38 and 111) had been carried out. The process has been modelled simulating the experimental conditions. The computed results were found to be consistent with the experimental ones. All the experiments show a continuous increase of the polarization layer along the channel, regardless of the crossflow velocity, except near the outlet of the cell due to an edge effect. This increase in the polarization layer is greater at lower Re, although it does not influence very much the permeate flux. In contrast, what substantially affects the permeate flux, much more than Re number, is the feed concentration due to its osmotic pressure.

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Section: Introductionmentioning

confidence: 99%

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Salcedo‐Díaz

García-Algado

Garcia‐Rodriguez

et al. 2014

Journal of Membrane Science

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“…cross-flow [63,64] and frontal filtration [63,65] geometries (applicable for Jr < 1 or Jr ≈ 1); -steric effect of pore blocking or bridging pore blocking (also applicable for Jr < 1 or Jr ≈ 1); -dynamic polymer adsorption on the membrane's pore walls, as described in particular by Bagassi et al [47] on track-etched membranes (applicable for Jr > 1). Manifestly, the first two mechanisms can lead to the formation of a filter-cake of polymer physical gel on the membrane surface.…”

Section: Microscopic Mechanismsmentioning

confidence: 99%

Hydrophobically Modified Sulfonated Polyacrylamides for IOR: Correlations between Associative Behavior and Injectivity in the Diluted Regime

Dupuis

Rousseau

Tabary

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…These layers change the concentration gradient through the membrane and serve as additional kinetic barriers to the fast permeating substances and, in result, reduce the values of the volume and solute fluxes (Abu-Rjal et al 2014;Barry and Diamond 1984;Ślęzak 1989;Dworecki 1995;Dworecki et al 2003Dworecki et al , 2005Kargol 2000;Ślęzak et al 1985, 2010. The processes of creation and destruction of CBLs may be visualized by optical methods (Dworecki 1995;Fernández-Sempere et al 2009;Salcedo-Diaz et al 2014).…”

Section: Introductionmentioning

confidence: 99%

$$H^{*}$$ H ∗ Peusner’s Form of the Kedem–Katchalsky Equations for Non-homogenous Non-electrolyte Binary Solutions

et al. 2015

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The paper presents a hybrid matrix form of Kedem-Katchalsky equations that contains Peusner's coefficients H * i j (i, j = 1, 2) for the conditions of concentration polarization and H i j for homogeneous solutions. The aqueous glucose solutions were analyzed in Nephrophan membrane system with membrane in horizontal plane. The calculations of coefficients H * i j were made for the A and B configurations of the membrane system. In the A configuration glucose solution with higher concentration was located below and the solution with lower concentration above the membrane. In configuration B locations of the solutions were reversed.

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Visualization and modelling of the polarization layer and a reversible adsorption process in PEG-10000 dead-end ultrafiltration

Cited by 23 publications

References 35 publications

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Visualization and modeling of the polarization layer in crossflow reverse osmosis in a slit-type channel

Hydrophobically Modified Sulfonated Polyacrylamides for IOR: Correlations between Associative Behavior and Injectivity in the Diluted Regime

$$H^{*}$$ H ∗ Peusner’s Form of the Kedem–Katchalsky Equations for Non-homogenous Non-electrolyte Binary Solutions

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