Influence of surface-active agents on the mass transfer from gas bubbles in a liquid—II

✍ Scribed by J.G. Vogtländer; F.W. Meijboom

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 440 KB
• Volume: 29
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(74)80086-2

✦ Synopsis

The mass transfer from a gas bubble in water is calculated for the important case where this mass transfer is decreased by the presence of surfactant in the liquid phase. In the calculation it is assumed that a stationary situation has been established as regards the exchange of surfactant between interface and bulk. The calculation takes as its starting point the equilibrium of forces existing between the drag force and the surface tension gradient at the bubble surface. The penetration theory is applied, allowance being made for the 'stretching' of the surface. Use is also made of Gibb's equation.

It seems probable that the group c (do/de)' is not only a measure of the influence of surface-active material on the mass transfer, but can also be characteristic of other processes, this group indicating the deceleration of the interfacial flow for a 'stretching' surface.

This model only holds when the mass transfer is decreased less than about 30 per cent.