A gas mixture containing 9.7 mole % CO₂ and 2.5 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 7945 m 3 /h, at 298 K and at a pressure of 1.11 atm. Water enters from top of the tower with a flow rate of 6500 kg/h and at 298 K. The expected recovery of ethanol will be 86 %, 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 69 % 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. Tower diameter 4. Mass flow rate of liquid 5. Packing Height 6. Effective interfacial area of packing per unit volume 7. Draw to scale the sketch of packed bed absorption tower with labels

A gas mixture containing 9.7 mole % CO2 and 2.5 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 7945 m 3 /h, at 298 K and at a pressure of 1.11 atm. Water enters from top of the tower with a flow rate of 6500 kg/h and at 298 K. The expected recovery of ethanol will be 86 %, and the maximum permissible pressure drop for the gas stream should not exceed 250 N/m. The value of the Henry's law constant for the ethanol - water system corresponding to a temperature of 298 K is H = 0.270 atm. Assume 69 % 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. Tower diameter 4. Mass flow rate of liquid 5. Packing Height 6. Effective interfacial area of packing per unit volume 7. Draw to scale the sketch of packed bed absorption tower with labels