首页|Ions transport in electromembrane desalination: A numerical modeling for the return flow system
Ions transport in electromembrane desalination: A numerical modeling for the return flow system
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NSTL
In this work, via numerical simulation, we conducted a detailed study on the manner of ion transport, the factors controlling the ion transport, and the effect of ion transport on the desalinating efficiency of the return-flow ion concentration polarization desalination system. An accurate numerical solver was developed to model the ions' transport in the system. Various configurations of applied voltage and fluid flow were enforced to in- vestigate the system response in Ohmic and limiting. Via examining the system in the different operating regimes and various conditions, we report a detailed theoretical understanding of system operation. With the increasing feeding flow rate, the simulation results show that the current and current utilization increases, the salt removal ratio changes inversely, and the energy per ion removed decreases. The system reaches its maximum value of current utilization at a value of porous membrane flow (PM-flow) or 0.04 mm/s in our investigation into the effects of this condition on the performance of the system. The findings are useful in optimizing the design and operation of the return flow -ion concentration polarization (RF-ICP) desalination system, giving firm evidence for the advantage of the ICP-desalination technology.
NSTL
