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Effect of gas sparger type on operational characteristics of a bubble column under mechanical foam control
Author(s) -
Andou Satoshi,
Yamagiwa Kazuaki,
Ohkawa Akira
Publication year - 1996
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199605)66:1<65::aid-jctb460>3.0.co;2-x
Subject(s) - sparging , bubble , mass transfer , materials science , mechanics , chromatography , chemistry , physics
The effects of gas sparger types on the operational characteristics of a bubble column (BC) with a rotating‐disk mechanical foam‐breaker (MFRD), such as foam‐breaking, foaming, flow and mass transfer characteristics, were studied. The required critical disk rotational speed, N c , and liquid hold‐up in the foam, ϕ L , reflected the foam‐breaking behaviour of the MFRD and the foaming behaviour of the BC respectively, which changed depending on the gas sparger type. The dependence of the gas sparger type on the gas hold‐up, ε g , was similar to that observed for the volumetric mass transfer coefficient, k L a . A comparative investigation of k L a with various gas spargers, in terms of the specific power input, also demonstrated the usefulness of the porous sintered glass bead filter as a gas sparger.