Nitrogen oxide storage material and exhaust gas purification method
US11298674B2 · kind B2 · utility
0Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2019 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Jan 15, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2240/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An object of the present disclosure is to provide an NOx storage material having sufficient NOx storage capacity even in a low temperature region and a production method thereof.An NOx storage material including a composite oxide of silver and gallium. The composite oxide of silver and gallium is preferably a delafossite-type composite oxide. The composite oxide is produced by dissolving a silver salt and a gallium salt in a solvent and baking the solution, wherein the molar ratio of silver:gallium is preferably from 2:8 to 7:3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.