The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2008
Filed:
Sep. 23, 2004
Byong K. Cho, Rochester Hills, MI (US);
Jong-hwan Lee, Rochester Hills, MI (US);
Byong K. Cho, Rochester Hills, MI (US);
Jong-Hwan Lee, Rochester Hills, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The ozone converts much of the NO in the NOcontaining exhaust stream to NO. The resulting NO/NOratio can be controlled by the input energy density to the plasma reactor. Ammonia and/or urea is added to the ozone treated exhaust in proportion to the NOcontent, and the stream passed into contact with a reduction catalyst, such as a base metal-exchanged zeolite, to convert the NOto nitrogen.