Exhaust gas clean up process

Patent · Tue Apr 11 00:00:00 EDT 1989

OSTI ID:6002249

Walker, R J

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
• Resource Relation: Patent File Date: Filed date 16 Jun 1988
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EXHAUST GASES
CLEANING
NITROGEN OXIDES
REMOVAL
SULFUR DIOXIDE
AQUEOUS SOLUTIONS
CHELATES
CHEMICAL REACTIONS
ELECTRODIALYSIS
PARTICULATES
SCRUBBING
SULFONATES
CHALCOGENIDES
COMPLEXES
DIALYSIS
DISPERSIONS
FLUIDS
GASEOUS WASTES
GASES
MIXTURES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SEPARATION PROCESSES
SOLUTIONS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
424000* - Engineering- Pollution Control Equipment- (1980-1989)
400201 - Chemical & Physicochemical Properties