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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.:

US 9579604 B1

PDFFull Text
Date of Patent:
Feb. 28, 2017

Filed:

Jun. 05, 2015

Base metal activated rhodium coatings for catalysts in three-way catalyst (twc) applications

Applicant:

Clean Diesel Technologies, Inc., Oxnard, CA (US);

Inventors:

Randal L. Hatfield, Port Hueneme, CA (US);

Stephen J. Golden, Santa Barbara, CA (US);

Johnny T. Ngo, Oxnard, CA (US);

Assignee:

Clean Diesel Technologies, Inc., Oxnard, CA (US);

Attorney:

Alston & Bird LLP

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 23/00 (2006.01); B01J 23/02 (2006.01); B01J 23/08 (2006.01); B01J 23/10 (2006.01); B01J 23/40 (2006.01); B01J 23/42 (2006.01); B01J 23/70 (2006.01); B01J 23/74 (2006.01); B01J 21/04 (2006.01); B01D 53/94 (2006.01); B01J 23/89 (2006.01); B01J 35/04 (2006.01); B01J 23/20 (2006.01); B01J 23/63 (2006.01); B01J 27/232 (2006.01); B01J 35/00 (2006.01);
U.S. Cl.
CPC ...
B01D 53/9472 (2013.01); B01D 53/945 (2013.01); B01D 53/9454 (2013.01); B01J 21/04 (2013.01); B01J 23/002 (2013.01); B01J 23/10 (2013.01); B01J 23/20 (2013.01); B01J 23/63 (2013.01); B01J 23/894 (2013.01); B01J 23/8906 (2013.01); B01J 27/232 (2013.01); B01J 35/0006 (2013.01); B01J 35/04 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/207 (2013.01); B01D 2255/209 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/2061 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2066 (2013.01); B01D 2255/2068 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/20715 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/40 (2013.01); B01D 2255/902 (2013.01); B01D 2255/908 (2013.01); B01J 2523/00 (2013.01); Y02T 10/22 (2013.01);
Abstract

Close-coupled catalysts (CCC) for TWC applications are disclosed. The novel CCCs are implemented using light-weighted ceramic substrates in which a thin coating employing a low loading of Iron (Fe)-activated Rhodium (Rh) material composition, with Iron loadings and an OSM of Ceria-Zirconia, are deposited onto the substrates. Different CCC samples are produced to determine and/or verify improved light-off (LO) and NOconversion of the CCCs. Other CCC samples produced are a CCC including a standard (non-activated) Rh thin coating and a heavily loaded CCC with a single coating of Pd/Rh material composition. The CCC samples are aged under dyno-aging using the multi-mode aging cycle and their performance tested using a car engine with ports on the exhaust to measure the emissions, according to the testing protocol in the Environmental Protection Agency Federal Test Procedure 75. During testing, the thin coatings of Fe-activated Rh exhibit improved light-off and NOconversion efficiency.

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