Exhaust gas clean up process

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:866912

Walker, Richard J ^[1]

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1. McMurray, PA

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 vaulable sulfate salt.

• Research Organization: USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4820391
• OSTI ID: 866912
• Country of Publication: United States
• Language: English

Related Subjects

exhaust
gas
clean
process
method
cleaning
containing
particulates
prescrubbing
water
remove
hcl
scrubbing
aqueous
absorbent
metal
chelate
dissolved
sulfite
salt
regenerating
solution
controlled
heating
electrodialysis
carbonate
addition
removed
nitrogen-sulfonate
oxides
sulfur
vaulable
sulfate
absorbent solution
gas containing
exhaust gas
metal chelate
sulfate salt
remove hcl
gas clean
containing particulate
sorbent containing
carbonate salt
aqueous absorbent
containing particulates
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