Carbon dioxide (A) is stripped from water (B) by air in a wetted-wall tube. At a location where pressure is 10 atm
and temperature is 25℃, the molar flux of CO2 is 1.62 lbmol/h ∙ ft2 . The partial pressure of CO2 is 8.2 atm at the interface and 0.1 atm in the bulk gas. The diffusion coefficient of CO2 in air at these conditions is 0.016 cm2 /s. Considering the bulk flow effect, calculate by film theory the mass-transfer coefficient (kc)g for the gas phase and the film thickness. For stripping process, mass transfer resistance mainly lies inside the gas film.
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