Numerical simulation of electrokinetic desalination using microporous permselective membranes

摘要: Abstract A new scheme for parallelization of microchannels ion concentration polarization-based seawater desalination is proposed. In the proposed system, microchannels/micropores are paralleled only in ion-selective membrane region and all other parts simply merged. two-dimensional simulation model developed to study performances such a by calculating salt removal ratio (SRR) average velocity fluid, under varied working conditions. Our results show that SRR >98% salinity (realizing drinkable water) achievable. It found stronger cross voltage strengthens electrokinetic flow second kind (EOF2) increases both velocity. Increasing pressure promotes fluid but decrease EOF2 significantly when depletion zone destroyed. Volumetric energy consumption per (EPIR) were also characterized electric field Energy as low 12.82 kWh/m3 was realized convert (salinity ~500 mM) desalinated water ~10 mM) at speed 0.56 mm/s. The overall cost process estimated 2.08 $/m3, which competitive small-scale applications.