Aqueous absorbents and membranes for a new flue gas SO/sub 2/ and NO/sub x/ removal process using electrodialysis for regeneration
A proposed process is described for removing SO/sub 2/ and NO/sub x/ simultaneously from power-plant flue gas by passing the gas through a wet scrubber, followed by electrodialysis to remove sulfite and sulfate ions from the scrubbing liquor and thermal stripping to remove NO/sub x/. The sulfite and sulfate ions are used to produce sulfuric acid, while the stripped NO/sub x/ is reburned in the boiler. Preliminary tests of a bench-scale electrodialysis stack are described. Absorption and stripping tests of various aqueous absorbents in a one-meter column are also described; the tests were conducted to screen the absorbents for NO/sub x/ and SO/sub 2/ removal ability. Emphasis was on metal-chelate solutions. The best absorbent tested removed 98% of the NO and 99% of the SO/sub 2/ from simulated flue gas containing 5.9% oxygen.
- Research Organization:
- U.S. Dept. of Energy, Pittsburgh Energy Technology Center, P.O. Box 10940, Pittsburgh, PA 15236
- OSTI ID:
- 6523719
- Report Number(s):
- CONF-861146-
- Resource Relation:
- Conference: AIChE winter annual meeting, Miami, FL, USA, 2 Nov 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
SORPTIVE PROPERTIES
CHELATES
FLUE GAS
DENITRIFICATION
DESULFURIZATION
ELECTRODIALYSIS
SCRUBBING
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION CONTROL
METALS
NITROGEN OXIDES
REMOVAL
SULFUR DIOXIDE
ABSORPTION
ADSORBENTS
MATERIALS TESTING
REGENERATION
SCRUBBERS
SULFATES
SULFITES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
CONTROL
DIALYSIS
DISPERSIONS
ELEMENTS
EQUIPMENT
GASEOUS WASTES
MIXTURES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SEPARATION PROCESSES
SOLUTIONS
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
TESTING
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
400201 - Chemical & Physicochemical Properties
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)