Page 260 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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Table 23, Other equations for calculation of the liquid-side controlled mass transfer coefficient of
random packings
Author Equation
Billet*
[287]

Onda et al.
1/s
[135] f \ f - \2/3f - \0-S

KPL J W J Ift J
Shi and
Mcrsmann
[288] k.=0A

Zcch*
P89]
k L=C\

* C is an experimental constant for the packing,

Billet and Schultes [316] offered the following equation for predicting
the liquid-side controlled mass transfer coefficient:

/ 1/2,
\l/2f
n. \
(158)

where Cu is an experimental coefficient depending on the packing type and
dimension, presented in Table 7.
Theoretically under the loading point & £is not dependent on the gas
phase hydrodynamics, respectively on 4,. Nevertheless, because Cu is
determined for each packing and size, the effect of this assumption is not of
practical importance. It is easy to see, that equation (158) is not dimensionless.
All the above mentioned equations do not take into account the
influence of surfactants on the liquid-side controlled mass transfer coefficient in
a packed bed column. The adding of such substances affects the hydrodynamics