Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1998-04-20
2000-05-09
Griffin, Steven P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
42324308, 423240R, 423356, 423DIG5, 106762, B01D 5340
Patent
active
060600306
ABSTRACT:
A method is provided for abating acidic contaminants, such as sulfur dioxide and hydrogen chloride, in exhaust gases while minimizing the formation of visible plumes of ammonium salts proximate to the outlet of the exhaust stack by injecting a spray of an alkaline liquid, such as sodium hydroxide or potassium hydroxide, into the contaminated exhaust gases wherein the pH of the alkaline liquid is high enough, i.e. greater than a pH of about 11, so that the acidic contaminants preferentially react with the alkaline liquid rather than the ammonia in the gases, thereby minimizing formation of visible plumes of ammonium salts.
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Hawks Ronald L.
Schwab James J.
Griffin Steven P.
Vanoy Timothy C.
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