Journal
CHEMICAL ENGINEERING SCIENCE
Volume 56, Issue 21-22, Pages 6233-6240Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0009-2509(01)00213-5
Keywords
mass transfer; hydrodynamics; bubble column; ozonation; axial dispersion; data treatment
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In the paper, major hydrodynamic parameters such as gas hold-up, phase velocities and axial dispersion as well as the ozone mass transfer coefficients in the liquid phase have been investigated in a tall bubble column for co-current, counter-current and semi-batch modes of operation. The major emphasis has been placed on evaluation of the dynamic characteristics of the combined system of experimental column and measuring sensors, which was applied in the subsequent determination of the axial dispersion and ozone mass transfer coefficients in the liquid phase. The ozone mass transfer coefficients have been estimated using two treatment methods of the recorded changes of ozone concentration in the liquid and gas phases with time during ozone absorption or stripping to an inert gas. (C) 2001 Elsevier Science Ltd. All rights reserved.
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