A gas mixture containing 9.9 mole % CO2 and 2.3 mole % ethanol is passed through an absorption tower to separate ethanol using water as solvent. The gas mixture enters from the bottom of the tower at a rate of 7690 m³ /h, at 298 K and at a pressure of 1.11 atm. Water enters from top of the tower with a flow rate of 6490 kg/h and at 298 K. The expected recovery of ethanol will be 88 %, and the maximum permissible pressure drop for the gas stream should not exceed 250 N/m2 . The value of the Henrys law constant for the ethanol - water system corresponding to a temperature of 298 K is H = 0.270 atm. Assume 73 % flooding condition. Use the equilibrium relationship y* = m x. Select a 50-mm ceramic raschig rings as packing material, Evaluate the following with suitable assumptions.

1- Number of ideal stages.

2- Flow Parameter.

3- Mass flow rate of liquid.

4- Packing Height.

5- Effective interfacial area of packing per unit volume.

6- Draw to scale the sketch of packed bed absorption tower with label.

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