Invention Grant
- Patent Title: Application of synergized-PGM with ultra-low PGM loadings as underfloor three-way catalysts for internal combustion engines
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Application No.: US15586823Application Date: 2017-05-04
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Publication No.: US10253669B2Publication Date: 2019-04-09
- Inventor: Zahra Nazarpoor , Stephen J. Golden , Maxime Launois
- Applicant: Clean Diesel Technologies, Inc.
- Applicant Address: US CA Oxnard
- Assignee: CDT Advanced Materials, Inc.
- Current Assignee: CDT Advanced Materials, Inc.
- Current Assignee Address: US CA Oxnard
- Agent Thaddius J. Carvis
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F01N3/10 ; B01J23/00 ; B01D53/94 ; F01N13/00 ; B01J37/02 ; B01J23/889 ; B01J23/89 ; B01J35/00

Abstract:
Synergized platinum group metals (SPGM) with ultra-low PGM loadings employed as underfloor (UF) three-way catalyst (TWC) systems with varied material compositions and configurations are disclosed. SPGM UF catalysts in which ZPGM compositions of binary and ternary spinel structures supported onto support oxides are coupled with commercialized PGM close-coupled (CC) catalysts and tested under Federal Test Procedure FTP-75 within TGDI and PI engines. The performance of the TWC systems including commercialized PGM CC and SPGM UF (with ultra-low PGM loadings) catalysts is compared to the performance of commercialized PGM CC and PGM UF catalysts. The disclosed TWC systems indicate that SPGM UF TWC catalytic performance is comparable or even exceeds high PGM-based conventional TWC catalysts, with reduced tailpipe emissions.
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