Method for purifying exhaust gas from internal combustion engines
US6596247B1 · kind B1 · utility
2Cited by
27References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1999 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jul 7, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/20707
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst being formed of a porous supporter supporting alkali metals, Ti and noble metal, or further supporting at least one of rare earth metal and magnesium, being disposed in a flow passage of the internal combustion engine, and being used to purify NOx contained in the exaust gas. The above catalyst has excellent NOx resistance not only to the exaust gas burnt with the stoichiometric air-to-fuel ratio or rich condition, but to the exhaust gas burnt with the lean condition, and furthermore has a high resistivity to poisoning of SOx slightly contained in the fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.