Process for the removal of acid forming gases from exhaust gases
Exhaust gases are treated to remove NO or NO[sub x] and SO[sub 2] by contacting the gases with an aqueous emulsion or suspension of yellow phosphorus preferably in a wet scrubber. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50 C is attractive. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO[sub x] and SO[sub 2], alkalis that are used for flue gas desulfurization are preferred. With this process, 100% of the by-products created are usable, and close to 100% of the NO or NO[sub x] and SO[sub 2] can be removed in an economic fashion. 9 figs.
- DOE Contract Number:
- AC03-76SF00098
- Assignee:
- Univ. of California, Berkeley, CA (United States)
- Patent Number(s):
- US 5164167; A
- Application Number:
- PPN: US 7-261229
- OSTI ID:
- 7309911
- Resource Relation:
- Patent File Date: 24 Oct 1988
- Country of Publication:
- United States
- Language:
- English
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Process for the removal of acid forming gases from exhaust gases and production of phosphoric acid
Process for the removal of acid forming gases from exhaust gases and production of phosphoric acid
Related Subjects
01 COAL, LIGNITE, AND PEAT
EXHAUST GASES
DENITRIFICATION
DESULFURIZATION
AIR POLLUTION CONTROL
NITRIC OXIDE
NITROGEN OXIDES
SULFUR DIOXIDE
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
FLUIDS
GASEOUS WASTES
GASES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010800 - Coal
Lignite
& Peat- Waste Management