Page 447 - Air Pollution Control Engineering

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Gas Phase Activated Carbon Adsorption 419

L Vessel length (ft)
v
m Empirical parameter or slope of equilibrium curve
M Molecular weight (lb/lb-mol)
M HAP inlet loading rate (lb/h)
HAP
NA Number of beds adsorbing
ND Number of beds desorbing
P System pressure drop (atm)
P Partial pressure (psia)
partial
Q Dilution air required (scfm)
d
Q Emission stream flow rate (scfm)
e
Q e,a Actual emission stream flow rate (acfm)
Q′ Actual emission stream flow rate per adsorbing bed (acfm)
e,a
Q Steam flow rate, (lb/min)
s
R Gas constant, (atm/lb-moleºR)
RCN Required canister number
R Relative humidity (%)
hum
2
S Vessel surface area (ft )
St Steam regeneration rate (lb steam/lb carbon)
T Temperature (ºR)
T Emission stream temperature (ºF)
e
UEL Upper explosive limit (%)
U Emission stream velocity (ft/sec)
e
W Carbon bed working capacity (lb HAP/lb carbon)
c
W Carbon bed equilibrium capacity (lb HAP/lb carbon)
e
REFERENCES
th
1. US EPA, OAQPS Control Cost Manual, 4 ed. EPA 450/3-90-006 (NTIS PB90-169954).
US Environmental Protection Agency, Washington, DC, 1990.
2. Carlos Nunez of US EPA AEERL to Michael Sink, Pacific Environmental Services, Inc.,
Memorandum with attachment. US Environmental Protection Agency, Washington, DC,
1989.
3. Karen Catlett of US EPA OAQPS to Carlos Nunez of US EPA AEERL, Memorandum with
attachment. US Environmental Protection Agency, Washington, DC, 1989.
4. Michael Sink of Pacific Environmental Services, Inc. to Al Roy of Calgon Corp.,
Memorandum, 1989.
5. Pacific Environmental Services, Inc. Company data for the evaluation of continuous com-
pliance monitors, 1989.
6. US EPA, Soil Vapor Extraction VOC Control Technology Assessment. EPA-450/4-89-017
(NTIS PB90-216995). US Environmental Protection Agency, Washington, DC (1989).
7. US EPA, Handbook: Control Technologies for Hazardous Air Pollutants. EPA 625/6-91-014
(NTIS PB91-228809). US Environmental Protection Agency, Cincinnati, OH, 1991.
8. Michael Sink of Pacific Environmental Services, Inc to U. S. Gupta of Calgon Corp. Private
Communication,1991.
9. US EPA, Carbon Adsorption for Control of VOC Emissions: Theory and Full Scale System
Performance. EPA 450/3-88-012. US Environmental Protection Agency, Research Park,
NC, 1988.
10. A. Turk, and K. A. Brownes, Chem Eng. 58, 156–158 (1951).