Gas phase controlled mass transfer from a bubble

✍ Scribed by M. Filla; J.F. Davidson; J.F. Bates; M.A. Eccles

• Book ID: 103007480
• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 836 KB
• Volume: 31
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(76)80005-x

✦ Synopsis

Values of k were measured for a large bubble (slug) rising through absorbing liquid in a tube. Ammonia, in various inert gases, was the diffusant, and analysis was by titration.

Velocities within a bubble held stationary by a downward liquid flow were measured with a hot wire anemometer:

these measurements, together with smoke tests, revealed a circulating toroidal vortex inside the bubble, with a good deal of turbulence especially for bubbles in large tubes. Theoretical analysis of concentration profiles within the slug was based on two alternative assumptions: (a) that there was streamline motion in the toroidal vortex, and (b) that there was complete mixing in the bulk of the slug but a concentration boundary layer near the interface. Comparison of results with experimental measurements of k.

shows that (b) gives good prediction of ko.