Nitrogen oxide removing catalysts
US5863855A · kind A · utility
10Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1996 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Jul 26, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/902
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a catalyst for removal of nitrogen oxides in an exhaust gas by adding ammonia to the exhaust gas and hydrogenating catalytically wherein said catalyst is in a two-layered structure comprising a lower layer which is a molded article consisting of components having denitration activity covered with an upper layer which has a abrasion resistance lower than that of the lower layer and which is a coating of particulate components having 2 peaks in its particle size distribution within the range from 0.1 to 50 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.