Q5 // Gas, from a petroleum distillation column, has its concentration of H,S reduced from 0.03 kmol H,S/kmol of inert hydrocarbon gas to I per cent of this value, by scrubbing with a 0.034 kmol/m.s of liquid solvent free from H2S in a countercurrent tray tower, operating at 300 K and at atmospheric pressure and 0.0136 kmol inert hydrocarbon gas /m.s enters the tower .H,S is soluble in such a solution and the equilibrium relation may be taken as Y = 2X. Find the actual trays required for 25% efficiency of tray

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