Stripping of CO2 from water by air in a wetted-wall tube. Carbon dioxide is stripped from water by air in a wetted-wall tube. At a location where pressure is 10 atm and temperature 25°C, the flux of CO2 is 1.62 lbmol/h-ft^2. The partial pressure of CO2 is 8.2 atm at the interface and 0.1 atm in the bulk gas. The diffusivity of CO2 in air at these conditions is 1.6 x 10^-2 cm^2/s. Assuming turbulent flow, calculate by film theory the mass-transfer coefficient kc for the gas phase and the film thickness.