NOx reduction catalyst having excellent low-temperature characteristics
US7501105B2 · kind B2 · utility
5Cited by
7References
5Claims
0Family size
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Key dates
| Filing date | Jul 28, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Jan 20, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A NOx removal catalyst comprising a carrier that includes a zeolite, and preferably a β-zeolite, that has undergone ion exchange with iron, and ferric oxide supported on the carrier. This NOx removal catalyst can be used favorably in a selective catalytic reduction process wherein nitrogen oxides contained in the exhaust gas from a diesel engine are reduced and removed by ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.