Abstract
Abstract Absorption of oxygen from air into distilled water in a new type of airlift tube reactor has been investigated at the 1.3 1 scale. Results of this mass transfer study together with hydrodynamic results provide a means of optimizing the geometrical parameters of the reactor. The overall volumetric oxygen transfer coefficient ( K L a ) was measured as a function of the gas velocity in reaction tubes, the liquid hold-up in the reactor expressed in terms of liquid height, the cross-sectional area ratio of the recycle-to-reaction tubes ( A rec / A ), the liquid temperature and specific power input. The K L a was measured using a dynamic gassing method with polarographic measurements of dissolved oxygen.
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