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:
Oct. 30, 2001
Filed:
Jul. 10, 1998
Applicant:
Inventors:
Assignee:
Dornier GmbH, Friedrichshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/356 ; B01D 5/394 ;
U.S. Cl.
CPC ...
B01D 5/356 ; B01D 5/394 ;
Abstract
An Ag-containing solid, such as Ag,O, Ag,CO,, and AgOH, is used for storing/releasing nitrogen oxides in an exhaust gas from an engine during controlled cycling of the &lgr;-value of the exhaust gas. The nitrogen oxides are stored at &lgr;-values of the gas greater than 1 in the Ag-containing solid and the nitrogen oxides are released at &lgr;-values of the gas less than or equal to 1 from the Ag-containing solid. The Ag-containing solid may include a precious metal or a microporous carrier, for example, ZrO,, SiO,, TiO,, Si—Al mixed oxide, and zeolites.