A gas having a density of 0.0745 lb/ft3 flows at 18 lb/hr ft2 through a tower packed with 1 in carbon Raschig rings. The gas is scrubbed with a liquid having a density of 62.3 lb/ft3 , a viscosity of 1 cP, and a flow rate of 1530 lb/hr ft2 . Employing Chens approach, estimate the required tower diameter, assuming the actual gas velocity to be 50% of the superficial gas velocity. Packing values of carbon Raschig rings are Av =58 ft2 /ft3 = 0.73