A stream of 40 kmol/s (34.5 bar and 298K) of syngas with 10% CO2 is processed in a 12-tray absorption column to remove 99.5% of it before further stages. The equilibrium data for the system CO2amine is given in Table P5.27.

The L/G ratio is 1.5, the minimum one. Determine the efficiency of the trays.

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Table P5.27 Equilibrium Data mol CO2/mol Amine 0.025 0.048 0.145 0.276 0.327 0.45 0.9 PCO(Pa) 65 197 1204 3728 4815 8253 26,325 10 1,480,620 15 2,918,315 20 4,722,992