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US 6,284,202 B1Granted
Device for microwave removal of NOx from exhaust gas
AssigneeCha Corporation
InventorsChang Yul Cha, Charles T. Carlisle
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Abstract
The subject invention is a commercial device to effectively remove NOx and other pollutants from an exhaust gas stream. Microwave enhancement of oxidation/reduction catalysis is selectively employed as the exhaust gas stream traverses a bed of catalyst particles, which may operate as either a fixed or fluidized bed. An unique feature involves the conventional, non-microwave, conversion of NO to NO2; however, the subsequent reaction of reducing NO2 is microwave enhanced.
Claims5
A commercial device for NOx removal from an exhaust gas stream comprising:
- a structural microwave cavity;
- a bed with a designated gas stream inlet enclosed by said cavity composed of compound oxidation/reduction catalyst particles interspersed with a form of microwave energy absorbing material, wherein said bed is selected from the group consisting of fluidized bed, fixed bed, and combinations thereof;
- and
- a microwave source radiating said cavity positioned at an external location of said bed, which is selected from the group consisting of top, bottom, and combinations thereof, a control means for selecting the frequency of said microwave source is used with reference to the frequency's penetration depth through said bed, and wherein said bed is divided into dynamic sections by said penetration depth.
1 more element
Dependencies are inferred from the claim text.