Catalyst for purifying exhaust gas
US7759283B2 · kind B2 · utility
23Cited by
26References
3Claims
0Family size
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Key dates
| Filing date | Jul 24, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Jul 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
To improve a CO conversion in stoichiometry-lean atmosphere, and additionally to prevent the rise of pressure loss.A catalytic coating layer 2 is constituted of a lower layer 20 including an oxygen storage capacity material and an upper layer 21 being formed on a surface of the lower layer 20 and including a catalytic noble metal, and a thickness of the upper layer is adapted so as to be 5 μm-40 μm. The upper layer 21 is good in terms of gas diffusibility, and thereby OSC resulting from the oxygen storage capacity material being included in the lower layer 20 is demonstrated maximally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.