Determination of the interfacial area and mass transfer coefficients in the Taylor gas–liquid flow in a microchannel

The interfacial area in the Taylor (slug) gas–liquid flow in a microchannel was measured by the Danckwerts' (chemical) method, using CO 2 absorption from the CO 2/N 2 mixture into KHCO 3/K 2CO 3 buffer solutions, containing NaOCl as a catalyst. The rate of absorption was determined and the Danc...

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Bibliographic Details
Published in:Chemical engineering science 2011-12, Vol.66 (23), p.6048-6056
Main Authors: Sobieszuk, PaweŁ, Pohorecki, Ryszard, Cygański, PaweŁ, Grzelka, Jacek
Format: Article
Language:English
Subjects:
Absorption
Absorption, stripping
Applied sciences
Carbon dioxide
Chemical engineering
Exact sciences and technology
Heat and mass transfer. Packings, plates
Hydrodynamics of contact apparatus
Interfacial area
Liquid films
Liquids
Mass transfer
Mathematical analysis
Microchannels
Microstructure
Multiphase flow
Reactors
Slugs
Taylor flow
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Summary:The interfacial area in the Taylor (slug) gas–liquid flow in a microchannel was measured by the Danckwerts' (chemical) method, using CO 2 absorption from the CO 2/N 2 mixture into KHCO 3/K 2CO 3 buffer solutions, containing NaOCl as a catalyst. The rate of absorption was determined and the Danckwerts' plots were constructed. Reasonable agreement with the geometrical area measured photographically was obtained. This fact allowed to determine for the first time the mass transfer coefficients separately for liquid film and liquid caps. A correlation for the calculation of mass transfer coefficients has been proposed. ► The interfacial area in the Taylor gas–liquid flow in a microchannel was measured. ► The Danckwerts' method, using CO 2 absorption into KHCO 3/K 2CO 3 buffer was used. ► The rate of absorption was determined and the Danckwerts' plots were constructed. ► Reasonable agreement with the area measured photographically was observed. ► A correlation for the calculation of mass transfer coefficients has been proposed.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2011.08.029