Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Reexamination Certificate
2006-07-25
2006-07-25
Caldarola, Glenn (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
C422S171000, C422S172000, C422S174000, C423S212000, C423S213200, C423S213700, C060S272000, C060S273000, C060S274000, C060S275000, C060S282000, C060S299000
Reexamination Certificate
active
07081231
ABSTRACT:
The present disclosure pertains to a system and method for treatment of oxygen rich exhaust and more specifically to a method and system that combines non-thermal plasma with a metal doped γ-alumina catalyst. Current catalyst systems for the treatment of oxygen rich exhaust are capable of achieving only approximately 7 to 12% NOxreduction as a passive system and only 25–40% reduction when a supplemental hydrocarbon reductant is injected into the exhaust stream. It has been found that treatment of an oxygen rich exhaust initially with a non-thermal plasma and followed by subsequent treatment with a metal doped γ-alumina prepared by the sol gel method is capable of increasing the NOxreduction to a level of approximately 90% in the absence of SO2and 80% in the presence of 20 ppm of SO2. Especially useful metals have been found to be indium, gallium, and tin.
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Aardahl Christopher L.
Balmer-Miller Mari Lou
Chanda Ashok
Habeger Craig F.
Koshkarian Kent A.
Battelle (Memorial Institute)
Caldarola Glenn
Caterpillar Inc.
Liell & McNeil
Wachtel Alexis
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