Selective catalytic reduction articles and systems
US11448110B2 · kind B2 · utility
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7References
27Claims
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Key dates
| Filing date | Aug 4, 2017 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.