Palladium oxide dispersed on spinel oxides as catalysts for direct NOx decomposition
US10143965B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2017 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | May 9, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Active catalysts for the treatment of a low temperature exhaust gas stream are provided containing palladium oxides dispersed on a spinel oxide for the direct, lean removal of nitrogen oxides from the exhaust gas stream. The low temperature (from about 400° C. to about 650° C.), direct decomposition is accomplished without the need of a reductant molecule. In one example, PdO may be dispersed on a surface of a metal oxide support, such as Co3O4 spinel oxide, synthesized using wet impregnation techniques. The PdO/Co3O4 catalyst system converts nitric oxide to nitrogen gas with high product specificity, avoiding the production of a significant concentration of the undesirable N2O product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.