Influence of Bubble Bouncing on Mass Transfer and Chemical Reaction

Publikationstyp
Journal Article
Date Issued
2016-10-01
Sprache
English
Author(s)
Timmermann, Jens  
Hoffmann, Marko  
Schlüter, Michael  orcid-logo
Institut
Mehrphasenströmungen V-5  
TORE-URI
http://hdl.handle.net/11420/5774
Journal
Chemical engineering & technology  
Volume
39
Issue
10
Start Page
1955
End Page
1962
Citation
Chemical Engineering and Technology 10 (39): 1955-1962 (2016-10-01)
Publisher DOI
10.1002/ceat.201600299
Scopus ID
2-s2.0-84988457097
The hydrodynamics of bubbly flows is dominated by bubble-induced turbulence and bubble-bubble interactions. Both phenomena influence the gas-liquid mass transfer as well as the mixing of reactants. If the time scales of mass transfer and mixing are in the same order as the time scales of a parallel-consecutive reaction, the yield and selectivity will be affected by the local hydrodynamics. An experimental setup is presented that enables the investigation of mass transfer during well-defined and adjustable bubble collisions. The influence of CO2 bubble collisions on mass transfer is measured and modeled with a modified Sherwood number correlation. Further visualization of the concentration field in the vicinity of O2 bubbles by means of laser-induced fluorescence demonstrates the dependency of mass transfer from a chemical reaction and permits the development of a first model approach.
Subjects
Bouncing
Boundary layer deformation
Mass transfer
Sherwood number correlation
Sodium sulfite reaction
DDC Class
600: Technik