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Large scale preparation of microbubbles by multi‐channel ceramic membranes: Hydrodynamics and mass transfer characteristics
Author(s) -
Han Yang,
Liu Yefei,
Jiang Hong,
Xing Weihong,
Chen Rizhi
Publication year - 2017
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.22825
Subject(s) - microbubbles , mass transfer , mass transfer coefficient , bubble , sparging , ceramic membrane , materials science , membrane , filtration (mathematics) , ceramic , superficial velocity , volumetric flow rate , mechanics , chemical engineering , analytical chemistry (journal) , flow (mathematics) , thermodynamics , chemistry , chromatography , composite material , acoustics , biochemistry , physics , statistics , mathematics , engineering , ultrasound
Microbubbles have potential applications in chemical engineering, water treatment, and medicine. By designing multi‐channel ceramic membrane distributors, large scale preparation of microbubbles is achieved in a co‐current bubble column. Oxygen and water are used as interacting gas‐liquid phases. Gas holdup, bubble size distribution, and mass transfer rate are influenced by the membrane pore size, superficial gas velocity, and cross flow velocity. The empirical correlations for gas holdup and volumetric mass transfer coefficient are formulated and good agreement with experimental data is obtained. The multi‐channel ceramic membranes can successfully produce a lot of microbubbles, resulting in larger values of gas holdup, volumetric mass transfer coefficient, and equilibrium dissolved oxygen concentrations as compared to the conventional gas sparger. These findings will aid the development of gas‐liquid reactors with high performances.