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:
Apr. 18, 2006
Filed:
Apr. 18, 2003
Albert N Chigapov, Aachen, DE;
Alexei a Dubkov, Aachen, DE;
Brendan Patrick Carberry, Aachen, DE;
Robert Walter Mccabe, Lathrup Village, MI (US);
Albert N Chigapov, Aachen, DE;
Alexei A Dubkov, Aachen, DE;
Brendan Patrick Carberry, Aachen, DE;
Robert Walter McCabe, Lathrup Village, MI (US);
Ford Global Technologlies, LLC., Dearborn, MI (US);
Abstract
The present invention provides new platinum group metal ('PGM') free catalytic compositions that comprise silver and/or cobalt stabilized ceria. These compositions facilitate soot oxidation during the regeneration of diesel particulate filters (DPF) thereby replacing PGM formulations. The compositions of the invention are particularly useful as washcoat compositions for DPFs as part of an automotive after-treatment system. Among the formulations tested, the silver-stabilized ceria and cobalt-stabilized ceria formulations e.g. can oxidize soot at 250–300° C. in the presence of NOand oxygen, while silver-stabilized ceria can oxidize diesel soot even in the presence of oxygen as the sole oxidizing agent at these temperatures. A perovshite composition containing Ag—La—Mn was very active at temperatures above 300° C.