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A countercurrent absorption column operating at 3 atm and 20 °C is used to scrub acetone...

  1. A countercurrent absorption column operating at 3 atm and 20 °C is used to scrub acetone from air into water. Separation is to be accomplished in 5 equilibrium stages. The total inlet gas flow rate is 100 kmol/h and contains 0.4 mol% acetone. The inlet liquid contains 0.01 mol% acetone. Outlet gas is 0.02 mol% acetone. Assume constant flow rates and note that the Henry’s law constant (H) for acetone in water at 20 °C is 1.186 atm/(mole fraction). Find the liquid flow rate required and the mole fraction acetone in the outlet liquid.
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