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On the contribution of small bubbles to mass transfer in bubble columns containing highly viscous liquids

✍ Scribed by F.L. Muller; J.F. Davidson

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
730 KB
Volume
47
Category
Article
ISSN
0009-2509

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✦ Synopsis

Experiments with 1 wt% aqueous CMC in a 14 cm diameter bubble column revealed biiodal bubble size distributions: large bubbles which conveyed most of the gas in plug flow and small bubbles. Dynamic and steady state oxygen transfer experiments showed that the small bubbles (i) contributed 20 to 50% of the mass transfer, and (ii) caused the measured steady state Kla values to he 30% greater than the measured dynamic Kla values.

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## Abstract Experiments reveal a fraction of tiny bubbles (β‰ͺ1 mm) in viscous gas‐liquid systems. It is plausible that the oxygen tension is these bubbles will be in equilibrium with that in the liquid within seconds. This means that, as regards to such oxygen concentration changes as occur on __k__