Passive NOx adsorption and decomposition
US11208928B2 · kind B2 · utility
0Cited by
4References
11Claims
0Family size
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Key dates
| Filing date | Apr 12, 2019 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Jun 10, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
NOx abatement compositions include cobalt oxide (Co3O4) doped with cerium, and have an overall formula Co3-xCe-O4, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NOx abatement compositions possess NOx storage and NOx direct decomposition activity. Dual stage NOx abatement devices include an upstream portion having the NOx abatement composition to adsorb and store NOx at low temperature, and then release the NOx at higher temperature to a downstream catalytic conversion portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.