Exhaust gas clean up process

Patent · Thu Jun 16 00:00:00 EDT 1988

OSTI ID:6353053

Walker, R. J.

A method of cleaning an exhaust gas containing particulates, SO/sub 2/ and NO/sub x/ is described. The method involves 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/ gas or nitrogen sulfonate ions and the oxides of sulfur are removed as a valuable sulfate salt. 4 figs.

• Research Organization: USDOE Pittsburgh Energy Technology Center, PA
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7207562
• Application Number: ON: DE89010800
• OSTI ID: 6353053
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ABSORPTION
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHELATES
CLEANING
COMPLEXES
DIALYSIS
DISPERSIONS
ELECTRODIALYSIS
EXHAUST GASES
FLUE GAS
FLUIDS
GASEOUS WASTES
GASES
HEAT TREATMENTS
HOT GAS CLEANUP
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INVENTIONS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PURIFICATION
REGENERATION
REMOVAL
SALTS
SCRUBBING
SEPARATION PROCESSES
SOLUTIONS
SORPTIVE PROPERTIES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
WASTES