Question

A dilute solution of solute A in solvent B passes through a tubular-membrane separator, where feed flows through the tubes. At a certain location, the solute concentration are 4.5x10-2 and 1.2x10-2 kmol/m3, respectively on the feed and permeate sides. The permeance of the membrane for solute A is 7.2x10-5 m/s. If the tube side Reynolds number is 15,000, the feed Schmidt number is 500, the diffusivity of the feed-side solute is 6.35x10-5 cm2/s and the internal diameter of the tube is 0.4cm, estimate the flux of the solute through the membrane if the mass-transfer coefficient on the permeate side of the membrane is 0.06 cm/s.