Exhaust gas cleaner and method for cleaning exhaust gas
US5714130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/9207
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas cleaner is constituted by a first Ag catalyst, a second Ag catalyst, a transition metal catalyst selected from the group consisting of a Pt catalyst, a W catalyst, a W+Pt catalyst and a mixed catalyst of the Pt catalyst and the W catalyst. The second Ag catalyst and the Pt catalyst may be physically mixed together to form a mixed catalyst. Another exhaust gas cleaner is constituted by an Ag catalyst, a Cu catalyst and a W+Pt catalyst. The Cu catalyst and the W+Pt catalyst may be physically mixed together to form a mixed catalyst. Still another exhaust gas cleaner is constituted by a mixed catalyst of an Ag catalyst and a Cu catalyst. The exhaust gas cleaner can effectively remove nitrogen oxides in a wide temperature range of exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.