A gas absorption tower is to be built to remove CO2 from a 100 kg/hr mixed stream of CO2 and N2 at a pressure of 1 atm and 25C by absorption into pure, deionized water. The gas mixture entering the tower contains 5 vol% CO2. The liquid stream entering the tower is pure water. Both the gas mixture and the solution in water are considered ideal. The tower is to be packed with 2 Raschig rings. To design this tower, do the following

a. In the CO2 water equilibrium diagram from question 1, add operating lines considering 3 cases (i) with minimum liquid flow; (ii) with 1.5x the minimum liquid flow (Hint: the slope of the operating line is the L/V ratio).

3 b. Calculate the tower diameter for the case where the gas velocity is half the flooding velocity.

c. Calculate the height of the tower if the interfacial mass transfer coefficient is 10-6 kg mol/s.m3.