Removal of nitrogen oxides from industrial gases by use of oxidizing solutions in which nitrates are the oxidants
Nitric oxide may be removed from gases which it is admixed by contacting the gases with aqueous solutions containing nitrate ions in sufficient concentration to oxidize the nitric oxide to nitrous acid and to retain it in the solution under stable conditions. Other oxides of nitrogen can also be absorbed producing nitrous acid which is retained in the aqueous solution in a similar manner. Thereafter, the scrubbing solution is regenerated under controlled conditions, producing a gas stream which contains the recovered nitrogen oxides in relatively high concentration and a scrubbing solution which can be recycled. The recovered nitrogen oxides may be used in the manufacture of nitric acid or other compounds or decomposed into harmless gases.
- Assignee:
- TIC; ERA-04-016947; EDB-79-026912
- Patent Number(s):
- US 4053555
- OSTI ID:
- 6507645
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
DENITRIFICATION
DESIGN
EQUIPMENT
FLUE GAS
GASEOUS WASTES
INDUSTRIAL PLANTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPERATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RECOVERY
SCRUBBERS
WASTES