✍ Scribed by Rémi E. Lebrun; Christian R. Bouchard; André L. Rollin; Takeshi Matsuura; S. Sourirajan
No coin nor oath required. For personal study only.
computer simulation has been performed to calculate the membrane performance data for a rectangular slit configuration. This has been achieved by coupling the surface force-pore flow model for membrane transport and the concentration-polarization model through a boundary condition. The dilTerentia1 equations for transport problems involved in both models have been solved by finite differences methods. Cellulose acetate and polysulfone membranes, both partially retentive to polyethylene glycol and bovin serum albumin, have been considered. The effect of variables on the solute separation, the permeation velocity and the concentration polarization are investigated. The variables were the pressure and the feed solute concentration, both at the slit inlet, and the average pore size and the pore size distribution of the membrane.
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The modeling of membrane filtration processes is only possible by applying black-box models or short-cut methods, because of its complexity due to molecular interactions on and inside the membrane. The assumptions made for the short-cut methods are applicable for reverse osmosis, whereas the simulat
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The final properties of a polymer commonly depend on its microstructural disorder. Solution step-growth copolymerization can lead to macromolecules with non-random distribution of monomeric units, by adjusting timing and rate of addition of reactants. We have developed a simulation program, based on