Storage-reduction type NOx purifying catalyst
US6956008B2 · kind B2 · utility
13Cited by
25References
10Claims
0Family size
Assignee
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Key dates
| Filing date | May 13, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Jul 30, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2258/012
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A storage-reduction type NOx purifying catalyst includes a monolith substrate having formed thereon a coat layer containing a cerium-zirconium composite oxide and a cerium-free oxide, a noble metal and an NOx storing material being supported on the coat layer and the cerium content of the cerium-zirconium composite oxide being less than 30 mol % based on the total molar number of metal atoms contained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.