Collect. Czech. Chem. Commun. 1988, 53, 763-770

Influence of liquid properties on mass transfer coefficients in bubble columns

Kurt Winklera, František Kaštánekb and Jan Kratochvílb

a Central Institute of Physical Chemistry, Academy of Sciences of the G.D.R., Berlin 1199, G.D.R.
b Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol, Czechoslovakia


The gas phase holdup, the specific interfacial area a, and the liquid-side volumetric mass transfer coefficient kLa have been determined for two selected binary systems water-butanol and butanol-2-ethylhexanol in a short bubble column of 150 mm i.d. at gas phase velocities (air) in the range of uG = (0.31-2.52) . 10-2 m s-1. The kLa-uG dependences show characteristic maxima which only partially can be explained by molecular and surface force interactions, induced by the liquid phase. The main parameter, influencing the kLa-values, is a. At small gas velocities some irregularities in the Sauter diameter d32 and in the values of separated kL are observed.