Iron oxide sorbents for regenerative sorption of No.sub.x
US3953575A · kind A · utility
9Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1973 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Nov 21, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The use of iron oxide sorbents to remove oxides of nitrogen (NO.sub.x) from gaseous mixtures containing small amounts of NO.sub.x such as the exhaust from an internal combustion engine or flue gases, without interference from carbon oxides or water vapor and thermally regenerable at relatively low temperatures, are disclosed. A preferred sorbent is supported ferric oxide for sorption of NO.sub.x from gaseous mixtures containing oxygen. Ferrous or ferrosoferric oxide sorbents are also suitable in the presence or absence of oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.