Encyclopedia of Environmental Science and Engineering, Volume I and II

1228 VAPOR AND GASEOUS POLLUTANT FUNDAMENTALS

TABLE 7

Equilibrium data for hydrogen chloride gas and water (Washburn, 1926)

Mass of HCl

per 100 Masses

H 2 O

Partial pressure of HCl, mm Hg (Torr)

10 C 30 C 50 C 80 C 110 C

78.6 840 — — — —

66.7 233 627 — — —

56.3 56.4 188 535 — —

47.0 11.8 44.5 141 623 —

38.9 2.27 9.90 35.7 188 760

31.6 0.43 2.17 8.9 54.5 253

25.0 0.084 0.48 2.21 15.6 83

19.05 0.016 0.106 0.55 4.66 28

13.64 0.00305 0.0234 0.136 1.34 9.3

8.70 0.000583 0.00515 0.0344 0.39 3.10

4.17 0.000069 0.00077 0.0064 0.095 0.93

2.04 0.0000117 0.000151 0.00140 0.0245 0.280

TABLE 8

Molecular diffusivities and Schmidt numbers for gaseous pollutants in air at 0C and 1 atm

Dv Sc&mDv

Typical Sc SO 2 0.40 ft^2 /hr 1.11  10 ^3 lb mole/ft-hr 1.28

High Scn-octane — 0.196 0.55 2.62

Low Sc NH 3 0.836 2.33 0.61

CO 2 0.535 1.49 0.96

CO 0.713 (/k)air  0.512 ft^2 /hr —

Prandtl numbers for gases Cpm/k

Air 0.69

CO 2 0.75

CO 0.72

NO 2 , NO 0.72

z = (^0) dz
L
FLUID VOLUME = � SL
z = L
FLUID
ENTERING
FLUID
LEAVING
CATALYST OF VOLUME = (1–�) SL
FIGURE 16
C022_001_r03.indd 1228 11/18/2005 2:33:10 PM