Exhaust gas cleaner
US5824621A · kind A · utility
8Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1995 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jun 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2258/012
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas cleaner being constituted by a first catalyst of a first porous inorganic oxide supporting a silver component in combination with a W component and a second catalyst of a second porous inorganic oxide supporting a Pt component and optionally a W component. The Ag component may include Ag and compounds thereof, the Pt component may include Pt, Pd, Ru, Rh, Ir, and Au, and the W component may include W, V, Mn, Mo, Nb, and Ta. The W component effectively catalyzes the reduction of nitrogen oxides by ammonia to enhance the removal efficiency of the exhaust gas cleaner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.