Nitrogen oxides and hydrocarbon storage catalyst and methods of using the same
US10953366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Aug 26, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nitrogen oxides (NOx) and hydrocarbon (HC) storage catalyst for treating an exhaust gas flow is provided. The NOx and HC storage catalyst includes (a) a zeolite, (b) noble metal atoms, and (c) a metal oxide, a non-metal oxide, or a combination thereof. One or more of the noble metal atoms is present in a complex with the metal oxide, the non-metal oxide or a combination thereof. The complex is dispersed within a cage of the zeolite. Methods of preparing the NOx and HC storage catalyst and methods of using the NOx and HC storage catalyst for treating an exhaust gas stream flowing from a vehicle internal combustion engine during a period following a cold-start of the engine are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.