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Design of stirred vessels with gas entrained from free liquid surface
Author(s) -
Patwardhan Ashwin W.,
Joshi Jyeshtharaj B.
Publication year - 1998
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450760303
Subject(s) - impeller , aeration , mass transfer , mass transfer coefficient , mechanics , environmental science , surface (topology) , selection (genetic algorithm) , mechanical engineering , materials science , environmental engineering , process engineering , engineering , mathematics , computer science , waste management , physics , geometry , artificial intelligence
In this review, the literature on surface aerators is critically analysed. In a number of studies, the critical speed for the onset of surface aeration has been correlated with the geometry of the system and the operating conditions. The studies on the rate of surface aeration, gas hold‐up, mass transfer coefficients are inadequate for the design and scale‐up. A comparison of the available designs, in terms of gas hold‐up, and mass transfer coefficient is presented. A mathematical model has been proposed for surface aeration. Guidelines have been given for the selection of impeller configuration and overall design of surface aerators. Suggestions have been made for future studies in this area.