Page 268 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
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Table 24. Geometrical characteristics of ceramic packings with vertical walls
No Packing type a, e, Element height, Incircle diameter dp,
2
m /m 3 mm mm
1 Honeycomb 151 0.764 61 20
2 Honeycomb 154 0.769 87 20
3 Honeycomb 105 0.775 99 30
4 Raschig rings 50x50x5 117 0.743 52 -
mm
5 Rings with a cross 190 0.612 50 -
50x50 mm
10 2 n
8 p
6 1 L* b
I iI
L 11.2
I /
a Ml/
w
8 ft t
6 If ,
%
// 3
r
1
10°
J
0 2 4 6 810
U, Its
Fig. 46. Comparison of the pressure drop per mass transfer unit for the packings given in Table 24
versus the volumetric mass transfer coefficient for absorption of ammonia from air in water.
