Question 3 (35 Points) It is required to recover 90% of CO₂ from an air stream containing 2.5 mol % CO₂ using dilute cau

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Question 3 35 Points It Is Required To Recover 90 Of Co From An Air Stream Containing 2 5 Mol Co Using Dilute Cau 1 (28.99 KiB) Viewed 12 times

Question 3 (35 Points) It is required to recover 90% of CO₂ from an air stream containing 2.5 mol % CO₂ using dilute caustic solution in a tray column absorber. The air flow rate is 250 kmol/h at 15° C, 1 atm. It may be assumed that the equilibrium curve is Y = 0.6 X, where Y and X are the mole ratio of CO₂ to CO₂-free carrier gas and liquid, respectively. Calculate: a) (5 Points) the mole fraction of CO₂ in the exit air stream? b) (5 Points) the minimum L/V molar flow rate ratio? c) (10 Points) the number of theoretical stages at L/V= 1.25 times the minimum using the graphical method. d) (5 Points) the actual number of required trays? (10 Points) the required column diameter? Assume the caustic solution has the same properties as water (PL = 989, M₁ = 18, VL = 1.0 CP)