Exhaust gas clean up process
Patent
·
OSTI ID:6002249
A method of cleaning an exhaust gas containing particulates, SO/sub 2/ and NO/sub x/ includes prescrubbing with water to remove HCl and most of the particulates, scrubbing with an aqueous absorbent containing a metal chelate and dissolved sulfite salt to remove NO/sub x/ and SO/sub 2/. and regenerating the absorbent solution by controlled heating, electrodialysis and carbonate salt addition. The NO/sub x/ is removed as N/sub 2/ or nitrogen-sulfonate ions and the oxides of sulfur are removed as a valuable sulfate salt.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4820391
- OSTI ID:
- 6002249
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
CLEANING
COMPLEXES
DIALYSIS
DISPERSIONS
ELECTRODIALYSIS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
REMOVAL
SCRUBBING
SEPARATION PROCESSES
SOLUTIONS
SULFONATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
400201 -- Chemical & Physicochemical Properties
42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
CLEANING
COMPLEXES
DIALYSIS
DISPERSIONS
ELECTRODIALYSIS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
REMOVAL
SCRUBBING
SEPARATION PROCESSES
SOLUTIONS
SULFONATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES