Mass transfer from Taylor bubbles rising in single capillaries

Gas–liquid mass transfer from Taylor bubbles rising in 1, 2 and 3 mm diameter capillaries of circular and square cross-sections was investigated for air–water system. The liquid-phase volumetric mass transfer coefficient kLakLa was obtained from experimental oxygen absorption dynamics. The experimental kLakLa values are in good agreement with the model developed by van Baten and Krishna (2004. Chemical Engineering Science 59, 2535–2545), with the additional assumption that the dominant mass transfer contribution is to the film surrounding the bubble.