1222 VAPOR AND GASEOUS POLLUTANT FUNDAMENTALS

1 10 100 1000

NVs × 103 cc/gm

RTV

s

fs fg

ln

cal/cc.

0

20

40

60

80

100

This work

373.2°K

296.9°K

273.2°K

194.7°K

180°K

150°K

100°K

77.4°K

CARBON MONOXIDE

FIGURE 10

(^1101001000)
100°F 20°C 0°C
25°C
40°C
60°C
90°C
200°F
400°F
Ray and Box Szepesy Lewis
(Silica Cell)
ETHYLENE
50
60
70
80
90
100
40
NVs × 103 cc/gm
RTV
s
fs fg
ln
cal/cc.
FIGURE 11
In most industrial adsorption processes, the gas is reacted
with some substance to form a semistable compound in
the liquid phase. This technique permits a great deal more
gas to be adsorbed per gallon of liquid circulated, and, in
most instances, will increase the mass transfer coefficient.
In this situation,
N k C C k C C
k C C
i g ig igI iLI iL
LE iLI iL
   

( ) ( )
( )
1

where E  enhancement factor, kL  mass transfer coef-
ficient in absorption E  1 for physical adsorption. The
enhancement factor can be found elsewhere (Astarita, 1967;
Danckwert, 1970; Sherwood et al., 1975).
Consider a system whose equilibrium line is straight
over the range of compositions which need be considered.
The mass transfer rate may be described in forms of pseudo
concentration values, thus,
N K C C K C Ci   g ig( ig) (L iL iL),
C022_001_r03.indd 1222 11/18/2005 2:32:50 PM