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:
Jan. 31, 2012
Filed:
Oct. 19, 2007
Joanne Elizabeth Melville, Dry Drayton, GB;
Robert James Brisley, Duxford, GB;
Orla Keane, Cambridge, GB;
Paul Richard Phillips, Royston, GB;
Elizabeth Hazel Mountstevens, Royston, GB;
Joanne Elizabeth Melville, Dry Drayton, GB;
Robert James Brisley, Duxford, GB;
Orla Keane, Cambridge, GB;
Paul Richard Phillips, Royston, GB;
Elizabeth Hazel Mountstevens, Royston, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
A method of reducing nitrogen oxides (NO) present in a lean gas stream comprising nitric oxide (NO) comprises the steps of: (i) net adsorbing NO per se from the lean gas stream in an adsorbent comprising palladium and a cerium oxide at below 200° C.; (ii) thermally net desorbing NO from the NO adsorbent in a lean gas stream at 200° C. and above; and (iii) catalytically reducing NOon a catalyst other than the NO adsorbent with a reductant selected from the group consisting of a hydrocarbon reductant, a nitrogenous reductant, hydrogen and a mixture of any two or more thereof. A system for carrying out such a method is also disclosed.