Question: Question 3 Experiment is conducted at 25C to evaluate the permeability performance of a 3x10-3 mpolysulfone membrane. The pressure different between the feed and permeate

Question 3 Experiment is conducted at 25C to evaluate the permeability performance of a 3x10-3 mpolysulfone membrane. The pressure different between the feed and permeate is 50 atm. The concentration of the inlet feed is 0.2579 g mol NaCl/kg H20 with a solution density of 1010 kg/m. After 3 hours of separation, the permeate is collected and its concentration is 0.3 kg NaCl/m' solution. The density of the permeate is approximately similar to the density of water, which is 997 kg/m due to the effective membrane separation. The flow rate of the permeate is 2.5 x 10 m solution/s. Assume that the gas law constant, R is 82.057 x 10 m atm/kg mol.K. The molecular weight of NaCl is 58.45 g/mol. a) Define osmotic pressure. (4 marks) b) Calculate the osmotic pressure at the feed side. (5 marks) c) Calculate the osmotic pressure at the permeate side. Determine the solvent permeability constant, A. (4 marks) d) (4 marks) e) Determine the solute permeability constant, As. Find the NaCl rejection, R. 6 marks) f) (2 marks) (Total: 25 marks)

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