Page 263 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

253

18
Top Pak
£ V,
1 • S3 mmPallririB, Hiflow ring I
[
I
1
i
I
5 <:
GO
7
50
J t
35.7 rnbar, d,=0,Z2m, H=1,45m /
40
}
1
15 30 3 al - f
l - 1 S3SBI/m fv 7 /
i 20 4Top Pak, m 3taL I/ /
B1 l/m"
3 ^ /
I* 1 fv
10 •SO Hiflr, =*al.
4? 4" aOMnnP
D
iO i
— i Omr
ring melai •
er- 20 \ pi
\ > r'
10 \ metal
1 —
II (1 as?i 50mm H 1 1
[
14 OR • 7 IB ? 4 78 32
Gas capacity factor•F s
Fig. 40, Performance data for metal packings Hiflow 50 mm and Top Pak compared with 50 mm
metal Pall rings in distillation of chlorobenzene/etiiilbenzene at total reflux.

3.2.2.1. Structured packings with vertical smooth walls

3.2.2.1.1 Description of the structured packings with vertical smooth watts
Theoretically at given specific area and free volume, the packings with
vertical walls ensure the lowest pressure drop at given gas and liquid superficial
velocities. It is shown later that they ensure also the lowest pressure drop per
mass transfer unit at a given volumetric mass transfer coefficient.