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:
Aug. 15, 2017
Filed:
Oct. 30, 2014
Clean Diesel Technologies, Inc., Oxnard, CA (US);
Zahra Nazarpoor, Camarillo, CA (US);
Anke Elizabeth Abken, Port Hueneme, CA (US);
Stephen J. Golden, Santa Barbara, CA (US);
Clean Diesel Technologies, Inc., Oxnard, CA (US);
Abstract
Effect of the type of ZPGM material composition to improve thermal stability of ZPGM catalyst systems for TWC application is disclosed. ZPGM catalyst system samples are prepared and configured with washcoat on ceramic substrate, overcoat including doped Zirconia support oxide, and impregnation layer including either CuMnOspinel or CuCoMnOspinel. Testing of ZPGM catalyst samples including variations of aging temperatures and different impregnation layer materials are developed under isothermal steady state sweep test condition for ZPGM catalyst systems to evaluate performance especially NOconversions and level of thermal stability. As a result disclosed ZPGM catalyst systems with most suitable spinel that includes CuCoMnOin impregnation layer exhibit high NOx conversion and significant improved thermal stability compare to CuMnOspinel, which is suitable for under floor and close coupled TWC application. The effect of adding Co to Cu—Mn spinel composition to improve thermal stability confirmed by TPR measurement.