Page 374 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Packed Towers 363
Ei
e 4.0 Tower Diameter = 12”
s Packing = I“ Berl Saddles
5 3.0 Pocked Height = IO’
- NaOH Concentrotion 5 2.0 -2.5 N.
-
0
& Temperature ~80-85OF.
I
Y 2.0 Conversion (15%
- Note: Slope of the Lower Portion
II)
el
0
3 of these Curves = 0.35
“i
I1
0
2 1.0
100 200 400 600 1,000 2poo
Air Flow Rate lG,Ibs./(Hr.)(sq.ft.)
Figure 9-79C. Cop absorption from atmosphere; effect of gas rate on %a at atmospheric pressure. Reproduced by permission of the Amer-
ican Institute of Chemical Engineers, Spector, N. A., and Dodge, B. F., Trans. A.bCh.E, V. 42 0 (1946) p. 827; all rights reserved.
2 2.0 Tower Diameter =12”
s Packing = Berl Saddles
2 Packed Height = IO’
u - NaOH Concentration =2.0-2.5 N.
L
a
0
Temperature = 80 -85’F.
L’ Conversion < 15%
5 1.0
In
\ Air Rate =579-595 Ibs./(Hr.)(sq.ft.)
V 0.8 -Ab% Pressure = 66psia.
s e Air Rate=680 Ibs./(Hr.)(sq.ft.)
0‘ 1 I IIIII --Abs. Pressure = 116 psia.
II 0.6
0 Air Rate=579-595 Ibs./(Hr)(sq.tt.l
20.5 Abs. Pressure= 116 psia.
1,000 2,000 4,000 6,000 10,000 -*-
Liquor Rate ,Ibs./(Hr.)(sq,ft.)-NaOH
Figure 9-79D. Cop absorption from atmosphere; effect of flow rates on Koa at elevated pressure. Reproduced by permission of the American
Institute of Chemical Engineers, Spector, N. A., and Dodge, B. F., Trans. A./.Ch.€., V. 42 0 (1 946) p. 827; all rights reserved.
Tower Diameter = 12”
Packing =I“ Berl Saddles
Pocked Height =IO‘
NaOH Concentration=2.0-2.5 N
Temperature =70-85O F.
Gas Rate =580-595 Ibs.l(Hd(sq.ft.1
Conversion 45%

Tower Pressure, (lbs,)(sq. in.l(Abs.1

Figure 9-79E. C02 absorption from atmosphere; effect of tower pressure on &a at various liquor rates. Reproduced by permission of the
American Institute of Chemical Engineers, Spector, N. A, and Dodge, 6. F., Ti. A/.Ch.E., V. 42 0 (1946) p. 827; all rights reserved.

c. Effect of temperature and pressure same as section
0.28 power of the rate ratio, KGa 0~ - “1” above.
( ;)o.28 3. Inlet CO2 concentration 5.0 to 10.0 mol%
b. No correction to gas rate, G, below loading. Above ka: Use Figures 9-80-82A-F.
loading point, increases with increase in gas a. Liquor rate correction follows section “2” above.
rate G, to the 0.3 power of the rate ratio. b. Increases with increase in gas rate, G, to the 0.15
0.3 power of rate ratio.
above loading c. Effect of temperature and pressure same as sec-
tion “1.”