Zinc manganese-iron spinel with an alkali metal stabilizer as an oxygen storage material resistant to rich/lean aging
US11559792B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Mar 19, 2021 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Apr 16, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oxygen storage material (OSM) includes a zinc manganese iron oxide (ZMF) and an alkali metal base on the ZMF surface. The ZMF has a spinel structure. The alkali metal containing ZMF can be formed to have a weight percent of alkali metal up to about two percent. The alkali metal carbonate is retained on the ZMF surface upon heating to a temperature greater than 1,000° C. and stabilizes the ZMF to the cycling of an oxygen rich and oxygen lean atmosphere. The OSM additionally catalyzes the oxidation of hydrocarbons and CO and catalyzes the reduction of NOx for use in catalytic converters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.