Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2006-05-23
2006-05-23
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C423S242100, C423S243060, C423S243080, C423S243110, C204S174000, C204S177000, C588S301000, C588S320000
Reexamination Certificate
active
07048899
ABSTRACT:
A process and apparatus for removing SO2, NO, and NO2from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2with an ammonia, ammonium hydroxide, alkali hydroxide or carbonate scrubbing solution, regenerating the scrubbing solution with limestone, and removing any particulate matter and aerosols generated by the scrubbing step in a wet electrostatic precipitator. The process can also remove Hg by oxidizing it to oxidized Hg and removing it in the wet electrostatic precipitator. The scrubbing solution is preferably regenerated with limestone or magnesium, and results in a Group II sulfite or sulfate that can be recovered and sold, or landfilled.
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Lee, etal. “The Effect of In Situ Generated Ammonia—Sulfer Aerosols on the Removal of NOx in a Wet ESP”, Aug. 20, 2001, Mega Symposium, Chicago, IL.
Alix Francis R.
Duncan Joanna L.
McLarnon Christopher R.
Decker Phillip E.
Lish Peter J.
Mesmer & Deleault, PLLC
Powerspan Corp.
Silverman Stanley S.
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