Page 97 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

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Table 1A. Volume of some atoms and molecules volumes
3
Atom volume, enrVatom Mol volume, cm /moi
B 27.0 H 2 14.3
C 14.8 o 25.6
2
Cl 24,6 N 2 31.2
H 3,7 Air 29.9
N in primary amines 10,5 CO 30.7
N in secondary amines 12.0 CO 2 34.0
N with saturated valence 15,6 SO 2 44.8
0 with saturated valence 7.4 NO 23.6
0 in aldexydes and ketones 7.4 N 2 O 36.4
O in esters 9.1 NH 3 25.8
0 in simple ethers 9.9 H 2 O 18.9
0 in esters and simple ethers 11.0 H 2S 32.9
O in acids 12.0 COS 51.5
O in compounds with S, P, N 8.3 Cl 2 48.4
S 25.6 Br 2 53.5
I 37.0 h 71.5

The diffusivity of some gases and vapours in air are given in Table 2A
[40].

Table 2A. Diffusivity of some gases and vapours in air at 0°C and 1 bar
6
1
Substance Aj.lO'nrVs Substance D a,l0 rn /s
Oxygen 17.8 Benzene 7.7
Nitrogen 13.2 Methanol 13.3
Hydrogen 61.1 Ethanol 10.2
Carbon dioxide 13.8 CS 2 8.9
Sulphur dioxide 10.3 Diethyl ether 7.8
Ammonia 17.0 HC1 13.0
Water vapour 21.9 SO 3 9.4