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Exhaust gas clean up process

Patent ·
OSTI ID:866912
 [1]
  1. McMurray, PA
+ Show Author Affiliations

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:
Pittsburgh Energy Technology Center
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

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Related Subjects

/204/423/
absorbent
absorbent solution
addition
aqueous
aqueous absorbent
carbonate
carbonate salt
chelate
clean
cleaning
containing
containing particulate
containing particulates
controlled
dissolved
electrodialysis
exhaust
exhaust gas
gas
gas clean
gas containing
hcl
heating
metal
metal chelate
method
nitrogen-sulfonate
oxides
particulates
prescrubbing
process
regenerating
remove
remove hcl
removed
salt
scrubbing
solution
sorbent containing
sulfate
sulfate salt
sulfite
sulfur
vaulable
water