Page 241 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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For calculation of the Bodenstein number of random packings, the
following equation is proposed.

=0.0S78Re^ Mls (126)
Bo G

where

(127)
D

The value of the power at {dpd) in equation (126) is too high to be true.
Of course, it is obtained experimentally and can be used for the investigated
packings, but is better to use a different experimental constant for each
investigated packing instead of such an enormously high power.
The comparison between the experimental data and the values
calculated by Eq.(126) is presented in Fig. 33.
2OQ

+ 20% / /
' /a
100 . -

o
Y

2S.4 mm Rashig rings
25,4 mm Pall rings
20 / : . . *
100 200
Cone/ated So.

Fig. 33. Comparison between the experimental*data for BQQ and the values calculating by Eq.
(126) for Raschig and Pall rings.