unsw ceic3001 tutrorial w4 advance thermo

unsw ceic3001 tutrorial w4 advance thermo - Question 2 A...

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SCHOOL OF CHEMICAL ENGINEERING CEIC3001 Advanced Thermodynamics and Separation Tutorial 4 Question 1 Solute A is to be stripped from a liquid solvent by contacting the liquid with a pure gas in a multistage countercurrent stripping column. The liquid enters the column at a rate of 100 kg mol/h (solute-free basis) and contains 30 mol% A. The gas enters the column at a rate of 500 kg mol/h. The liquid leaving the process contains 1.0 mol% A. The equilibrium distribution of the solute between the gas and liquid phases can be described by y A = 0.4 x A . a) What is the composition of the solute in the exit gas? b) Determine the number of equilibrium stages required for the given separation.
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Unformatted text preview: Question 2 A countercurrent absorption process is to be used to recover solute A from an inert gas. The concentration of A is reduced from A Y = 0.285 to A Y = 0.05 by contacting the gas with pure solvent. . The solubility of the solute in the solvent can be described by y A = 0.4 x A . a) What is the minimum solvent to gas ratio (solute-free basis) for the given separation? b) Determine the number of equilibrium stages required if the actual solvent to gas ratio (solute-free basis) is 1.2 times the minimum value....
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