Zoned ammonia slip catalyst for improved selectivity, activity and poison tolerance
US12194441B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Dec 10, 2020 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Dec 15, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalytic article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component and a support; a second catalytic region comprising a second PGM component on a support with low ammonia storage and a first SCR catalyst; and wherein the first catalytic region is covered by at least another catalytic region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.