Hydrodynamics and ozone mass transfer in a tall bubble column |
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| Affiliation: | 1. Universidade Federal de Minas Gerais – UFMG, Department of Sanitary and Environmental Engineering, Av. Antônio Carlos nº 6627 Bairro Pampulha, Belo Horizonte, Brazil;2. Universidade Federal de Minas Gerais – UFMG, Chemistry Department, Av. Antônio Carlos nº 6627 Bairro Pampulha, Belo Horizonte, Brazil;1. BIOMATH, Department of Mathematical Modeling, Statistics and Bioinformatics, Ghent University, Coupure Links 653, 9000, Ghent, Belgium;2. MARETEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisbon, Portugal;3. Department of Civil and Environmental Engineering, University of Florence, Via di S. Marta 3, 50139, Florence, Italy;1. Université Paris-Saclay, INRAE, UR PROSE, 1 rue Pierre-Gilles de Gennes, Antony F-92761, France;2. Université de Nantes, GEPEA, UMR 6144, 37 bd. de l’Université, F-44600 Saint Nazaire, France;3. INRAE, REVERSAAL, 5 Rue de la Doua, Villeurbanne Cedex F-69625, France;4. TBI, Université de Toulouse, CNRS, INP, INSA, UPS, Toulouse, France |
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| Abstract: | 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. |
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