Acetone must be absorbed by water in a packed column that has a cross-sectional area of 0.186m2 at 293K and 101.32kPa (1 atm). The incoming gas stream is composed of air and 2.6% by mole of acetone. It is desired to obtain the gas at the exit with 0.5% by mol of acetone. The gas stream is composed of 13.65 kmol/h of (inert) air. The stream of water enters pure with a flow of 45.36 kmol/h. The mass transport coefficient (volumetric) for the gaseous film is 3.78 x 10-2 kg mol/(s m3) and for the liquid film it corresponds to 6.16 x 10-2 kg mol/(s m3). The equilibrium in compositions for mentioned temperature and pressure respects the equation y=1.186 x. a) Using the method for dilute gas, calculate the required height of the packed column using the mass transport coefficient for the gas film. Use graph paper graph to estimate concentrations at the gas-liquid interface. b) Using the method for dilute gas, calculate the required height of the packed column using the mass transport coefficient for the liquid film. Use graph paper graph to estimate concentrations at the gas-liquid interface.
Acetone must be absorbed by water in a packed column that has a cross-sectional area of 0.186m2 at 293K and 101.32kPa (1 atm). The incoming gas stream is composed of air and 2.6% by mole of acetone. It is desired to obtain the gas at the exit with 0.5% by mol of acetone. The gas stream is composed of 13.65 kmol/h of (inert) air. The stream of water enters pure with a flow of 45.36 kmol/h. The mass transport coefficient (volumetric) for the gaseous film is 3.78 x 10-2 kg mol/(s m3) and for the liquid film it corresponds to 6.16 x 10-2 kg mol/(s m3). The equilibrium in compositions for mentioned temperature and pressure respects the equation y=1.186 x.
a) Using the method for dilute gas, calculate the required height of the packed column using the mass transport coefficient for the gas film. Use graph paper graph to estimate concentrations at the gas-liquid interface.
b) Using the method for dilute gas, calculate the required height of the packed column using the mass transport coefficient for the liquid film. Use graph paper graph to estimate concentrations at the gas-liquid interface.
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