Internal combustion engine exhaust gas purification apparatus, exhaust gas purification process and exhaust gas purification catalyst
US6841511B2 · kind B2 · utility
4Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | May 30, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0205
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Nitrogen oxides contained in an exhaust gas emitted from a lean-burn engine-mounted internal combustion engines are eliminated with a high efficiency.In an exhaust gas purification apparatus and process for eliminating nitrogen oxides contained in a combustion exhaust gas emitted from an internal combustion engine with a reducing gas such as carbon monoxide, hydrocarbons, etc. contained in the exhaust gas in the presence of a catalyst, a catalyst comprising all of Rh, Pt and Pd, at least one member selected from alkali metals and alkaline earth metals, and Mn or its compound, supported on a porous carrier is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.