Metal oxide-based SCR catalyst composition
US12318762B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 14, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Jan 15, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure provides SCR catalyst compositions capable of reducing nitrogen oxide (NOx) emissions in engine exhaust. The catalyst compositions include a reducible metal oxide support containing ceria, one or more transition metal oxides as a redox promotor; and an oxide of niobium, tungsten, silicon, molybdenum, or a combination thereof as an acidic promotor. The redox promotor and the acid promotor are both supported on the reducible metal oxide support. Further provided are SCR catalyst articles coated with such compositions, processes for preparing such catalyst compositions and articles, an exhaust gas treatment system including such catalyst articles, and methods for reducing NOx in an exhaust gas stream using such catalyst articles and systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.