Abstract
Numerical analysis was performed for the absorption of carbon-dioxide gas into a condensate film. A condensate film flowing on a vertical surface under the influence of the combined effects of the vapor shear and gravity was chosen as a model problem. Convective flux towards the wall surface played a significant role in the absorption characteristics. Concentrations of the carbon-dioxide and bicarbonate ion in the film increased as the condensation proceeded. The difference between the two concentrations at a same longitudinal position decreased as the condensation proceeded. Ionic dissociation equilibrium state, however, was not observed in the range analyzed. Resistivity of the condensate film was much larger for higher vapor velocity with smaller vapor-to-wall temperature difference, taking larger value for lower concentration of carbon-dioxide in the vapor phase. In addition, the resistivity became more sensitive to the condensing condition as the carbon-dioxide concentration in the vapor phase increased.
