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Relation of mechanical power to gas holdup and mass transfer in an agitated vessel
Author(s) -
Benadda Belkacem,
Ismaili Samir,
Otterbein Michel
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200306
Subject(s) - bubble , mass transfer , mechanics , mechanical energy , residence time distribution , mass transfer coefficient , flow (mathematics) , residence time (fluid dynamics) , gas bubble , materials science , thermodynamics , power (physics) , chemistry , physics , engineering , geotechnical engineering
Two devices were developed, mechanical and electrical, to measure the mechanical power relative to superficial gas velocity and stirring speed in a mechanically agitated reactor. Two bubble regimes were demonstrated. The study of gas holdup, obtained from the residence time distribution, and the bubble size, determined by interfacial area measurement, confirm these two regimes of flow. Our results show that the gas holdup, the interfacial area, and the liquid‐side mass transfer coefficient are increasing functions of the energy dissipated in the solution.