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Gas/Flüssig‐Reaktoren
Author(s) -
Mersmann Alfons
Publication year - 1989
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330610203
Subject(s) - reynolds number , mass transfer , thermodynamics , bubble , turbulence , mass transfer coefficient , mechanics , viscosity , dispersion (optics) , newtonian fluid , non newtonian fluid , materials science , chemistry , physics , optics
Abstract Gas‐liquid reactors . The gas hold‐up in bubble columns increases in proportion to the gas flux density in the homogeneous flow regime and rises less than proportionally in the heterogeneous flow regime. Both the gas and the liquid axial dispersion coefficient increase with gas flow. Gas phase dispersion becomes more intensive with increasing liquid viscosity, while liquid dispersion drops slightly. Experimental results for mass transfer in low viscosity liquids show that the two‐range turbulence model best fits experimental data. When aerating highly viscous Newtonian and non‐Newtonian liquids, mass transfer in the liquid phase is well described by known relations valid for very low bubble‐Reynolds number and very high Schmidt number.