Simultaneous removal of NO and SO[sub 2] in packed scrubbers or spray towers
- Cornell Univ., Ithaca, NY (United States)
- Dravo Lime Co., Pittsburgh, PA (United States)
Nitric oxide and sulfur dioxide can be removed from flue gas by scrubbing with a lime slurry containing ferrous EDTA. Tests in a 0.90m diameter column with several commercial packings gave 99 to 99.9 percent SO[sub 2] removal and 10 to 60 percent NO removal. The absorption of NO is controlled by the liquid-film resistance, and the number of transfer units varies with the square root of the ferrous EDTA concentration, the 0.4 to 0.6 power of the liquid rate, and the -1.0 power of the gas velocity, in agreement with predictions. The height of a transfer unit for NO absorption, corrected for end effects, was 10 to 15m, about 30 times the estimated values for SO[sub b] absorption, which is gas-film controlled. The spray tower gave lower removal rates for both gases, but the ratio of transfer units was about the same as for the packed columns. 8 refs., 5 figs., 1 tab.
- DOE Contract Number:
- AC22-90PC90362
- OSTI ID:
- 7031632
- Journal Information:
- Environmental Progress; (United States), Vol. 12:2; ISSN 0278-4491
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
FLUE GAS
DENITRIFICATION
DESULFURIZATION
NITRIC OXIDE
REMOVAL
SULFUR DIOXIDE
LIME-LIMESTONE WET SCRUBBING PROCESSES
CHALCOGENIDES
CHEMICAL REACTIONS
GASEOUS WASTES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
SCRUBBING
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions