An approach to increase the permselectivity and mono-valent ion selectivity of cation-exchange membranes by introduction of amorphous zirconium phosphate nanoparticles

Голубенко, Д. В.; Karavanova, Yu. A.; Melnikov, Stanislav; Achoh, Aslan; Pourcelly, G.; Yaroslavtsev, A. B.

doi:10.1016/j.memsci.2018.06.024

Cited by 51 publications

(26 citation statements)

References 60 publications

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“…At the limiting current density, the fluxes of the competing ions are controlled by the depleted diffusion layer and do not depend on the membrane properties Equation 9; the role of the membrane in terms of selective transfer is reduced to being a barrier for co-ions. The shape of the Tk vs. Uav dependence is in good agreement with the literature data [33,34]. of Na + .…”

Section: Modesupporting

confidence: 90%

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Mathematical Modeling of the Effect of Pulsed Electric Field on the Specific Permselectivity of Ion-Exchange Membranes

2021

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The application of pulsed electric field (PEF) in electrodialysis has been proven to be efficient for a number of effects: increasing mass transfer rate, mitigation of scaling and fouling, reducing water splitting. Recently, the improvement of the membrane permselectivity for specific counterions was discovered experimentally by the group of Laurent Bazinet (N. Lemay et al. J. Memb. Sci. 604, 117878 (2020)). To better understanding the effect of PEF in electrodialysis, simulations were performed using a non-stationary mathematical model based on the Nernst–Planck and Poisson equations. For the first time, it was not only the condition used when the current density is specified but also the condition when the voltage is set. A membrane and two adjacent diffusion layers are considered. It is shown that when applying the regime used by Lemay et al. (the same current density in conventional continuous current (CC) mode and during the pulses in PEF mode), there is a significant gain in specific permselectivity. It is explained by a reduction in the membrane concentration polarization in PEF mode. In the CC mode of electrodialysis, increasing current density leads to a loss in specific permselectivity: concentration profiles in the diffusion layers and membrane are formed in such a way that ion diffusion reduces the migration flux of the preferentially transferred ion and increases that of the poorly transferred ion. In PEF mode, the concentration profiles are partially restored during the pauses when the current is zero. However, if a different condition is used than the condition applied by Lemay et al., that is, when the same average current density is applied in both the PEF and CC modes, there is no gain in specific permeability. It is shown that within the framework of the applied mathematical model, the specific selectivity depends only on the average current density and does not depend on the mode of its application (CC or PEF mode).

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Section: Modesupporting

confidence: 90%

“…The shape of the Tk vs. Uav dependence is in good agreement with the literature data [33,34]. The shape of the T k vs. U av dependence is in good agreement with the literature data [33,34].…”

Section: Modesupporting

confidence: 89%

Mathematical Modeling of the Effect of Pulsed Electric Field on the Specific Permselectivity of Ion-Exchange Membranes

2021

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“…The principle of HSS removal from monoethanolamine (MEA) solvent by electrodialysis is schematically shown on Figure 1. Studies are conducted on the research of the influence of ion exchange membrane surface modification on the intensity and selectivity of ion transport [22,23,24]. However, both approaches enable to remove the charged species including HSS components, and the additional treatment like sand filter and active carbon might be required for removal of the neutral degradation products.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis

et al. 2019

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Heat stable salts (HSS) formed and continuously accumulated in the amine-based solvents due to solvent degradation and impurities in the feed gas can dramatically change the efficiency of the amine scrubbing process. HSS can be removed by using different methods including membrane separation such as electrodialysis (ED). In this work, we studied the effect of CO2 loading of the lean 30 wt % monoethanolamine (MEA) solution on the efficiency of HSS removal and MEA loss. In the model MEA solution containing HSS on the level of 48 meq/L, the carbon dioxide concentration was varied from 0.2 down to 0 mole (CO2)/mole (MEA). The reclaiming of model MEA solution was carried out by lab-scale two-stage ED unit when the concentrate stream after the first stage was additionally treated using ED (second stage) that allowed reducing MEA loss. It was shown that the decrease of carbon dioxide content from 0.2 down to 0 mole (CO2)/mole (MEA) resulted in a substantial reduction of both parameters—the MEA loss and the specific power consumption with respect to extracted HSS (from 140 down 37 kJ per 1 g of recovered HSS anions). This can be explained by the drop in the total concentration of ions formed by the interaction of MEA solution with carbon dioxide. However, the change of CO2 loading is associated with additional power consumption towards further solvent regeneration in the column. Based on the preliminary estimations of power consumption required for additional CO2 stripping with the respect to the power consumption of ED stage, it seems that lean solvent CO2 loading of 0.1 mole/mole provides an optimum for the power input at 25.9 MJ/kg(solvent).

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“…Phosphate is one of the indispensable minerals for life [20]. However, the development of materials of phosphate has a great interest in different technologies, noticeably in adsorption [21], membrane separation [22], ion exchange [23], biomedical treatment [24] and chemical precipitation [25]. Recently, the hybrid materials of phosphate have received considerable attention [26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel organic–inorganic hybrid nanocomposites of phosphate–benzimidazole by soft chemistry route in aqueous media

2019

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In this work, novel organic-inorganic hybrid nanocomposites M + /PO 3 − (M = 2,2′-dibenzimidazolyl butane) were prepared by soft chemistry method. The synthesis was done by ion exchange method between sodium metaphosphate anions (yNaPO 3 ) and 2,2′-dibenzimidazolyl butane dichlorhydrates cations (xMCl 2 ) in aqueous media. The MCl 2 organic salt and the M + /PO 3 − hybrid nanocomposites were characterized by using spectroscopic and microscopic analyses. The FTIR and Raman spectroscopy are showed new bands in the hybrid nanocomposites structure, which proved the interactions between PO 3 and NH of MCl 2 molecules. The UV-Vis results of MCl 2 and M + /PO 3 − materials showed a broad absorption band in 200-300 nm regions, originating from phosphate and benzimidazole molecules. The X-ray diffraction was showed the appearance of new peaks attributed to the phosphate (PO 3 ) and a reduction of the intensity of the benzimidazole peaks. The TEM images are showed changes in appearance and size of hybrid materials. Moreover, the surface of hybrids became less dark and the size of M + /PO 3 − nanocomposites diameter was < 50 nm. The EDX analysis results revealed the presence of carbon, oxygen, and phosphate, confirming the interactions between phosphate and MCl 2 organic salt.

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An approach to increase the permselectivity and mono-valent ion selectivity of cation-exchange membranes by introduction of amorphous zirconium phosphate nanoparticles

Cited by 51 publications

References 60 publications

Mathematical Modeling of the Effect of Pulsed Electric Field on the Specific Permselectivity of Ion-Exchange Membranes

Mathematical Modeling of the Effect of Pulsed Electric Field on the Specific Permselectivity of Ion-Exchange Membranes

Effect of Carbon Dioxide Loading on Removal of Heat Stable Salts from Amine Solvent by Electrodialysis

Synthesis and characterization of novel organic–inorganic hybrid nanocomposites of phosphate–benzimidazole by soft chemistry route in aqueous media

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