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. 29, 2002
Filed:
May. 13, 1996
Jennifer S. Feeley, Clinton, NJ (US);
Robert J. Farrauto, Westfield, NJ (US);
Michel Deeba, North Brunswick, NJ (US);
Engelhard Corporation, Iselin, NJ (US);
Abstract
A method for reduction of NO in a lean gaseous stream includes passing the gaseous stream at a temperature within the NO sorbing temperature range through a catalyzed trap member having an oxidation catalyst intimately combined with a sorbent material. The sorbed NO is periodically removed by introducing a combustible component into the gaseous stream and oxidizing it on the trap member to thermally desorb the NO . The amount of combustible component introduced is limited to maintain the gaseous stream bulk composition lean and to avoid increasing the bulk temperature of the gaseous stream to a temperature which is too high for effective lean NO abatement treatment. A suitable NO abatement catalyst is used to reduce the desorbed NO . Sorbing (trapping) and desorbing periods are alternated, usually in response to the temperature of the gaseous stream, and an apparatus to carry out the process is provided.