Exhaust gas treatment catalyst and exhaust gas treatment system
US8202481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Sep 20, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0036
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided are an exhaust gas treatment catalyst capable of reducing ammonia leakage rate while keeping a sufficient NOx removal efficiency, said catalyst comprising a coating layer and a catalyst base material, wherein said coating layer has a decreased thickness relative to that of a catalyst base material; and an exhaust gas treatment system using the same. In the exhaust gas treatment catalyst for catalytically removing nitrogen oxides from an exhaust gas by using ammonia as a reducing agent and simultaneously decomposing and removing unreacted ammonia, a coating layer comprising platinum supported on titania is formed on a surface of a porous catalyst base material comprising titania and at least one compound selected from oxides of vanadium (V), oxides of tungsten (W) and oxides of molybdenum (Mo).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.