Modelling of Ion Transport in Electromembrane Systems: Impacts of Membrane Bulk and Surface Heterogeneity
| Autor: | A. V. Kovalenko, Victor Nikonenko, Gérald Pourcelly, Mahamet K. Urtenov, S.A. Mareev, Andrey Nebavsky |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
02 engineering and technology Conductivity 010402 general chemistry 01 natural sciences lcsh:Technology law.invention ion transport lcsh:Chemistry law Reversed electrodialysis General Materials Science mathematical modelling permselectivity Instrumentation lcsh:QH301-705.5 Ion transporter Concentration polarization Fluid Flow and Transfer Processes Electrolysis charged ion-exchange membranes electroconvection lcsh:T Process Chemistry and Technology General Engineering concentration polarization Biological membrane Electrodialysis 021001 nanoscience & nanotechnology lcsh:QC1-999 0104 chemical sciences Computer Science Applications Membrane Chemical engineering lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 conductivity permeability 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 9, Iss 1, p 25 (2018) |
| ISSN: | 2076-3417 |
| Popis: | Artificial charged membranes, similar to the biological membranes, are self-assembled nanostructured materials constructed from macromolecules. The mutual interactions of parts of macromolecules leads to phase separation and appearance of microheterogeneities within the membrane bulk. On the other hand, these interactions also cause spontaneous microheterogeneity on the membrane surface, to which macroheterogeneous structures can be added at the stage of membrane fabrication. Membrane bulk and surface heterogeneity affect essentially the properties and membrane performance in the applications in the field of separation (water desalination, salt concentration, food processing and other), energy production (fuel cells, reverse electrodialysis), chlorine-alkaline electrolysis, medicine and other. We review the models describing ion transport in ion-exchange membranes and electromembrane systems with an emphasis on the role of micro- and macroheterogeneities in and on the membranes. Irreversible thermodynamics approach, “solution-diffusion” and “pore-flow” models, the multiphase models built within the effective-medium approach are examined as the tools for describing ion transport in the membranes. 2D and 3D models involving or not convective transport in electrodialysis cells are presented and analysed. Some examples are given when specially designed surface heterogeneity on the membrane surface results in enhancement of ion transport in intensive current electrodialysis. |
| Databáze: | OpenAIRE |
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