Process for the removal of nitrogen oxides from off-gases
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US 5401479 A |
| Request number: |
906,918 |
| Request date: |
Aug 21, 1992 |
| patent.field.start_date: |
|
| Registration date: |
Mar 28, 1995 |
| patent.field.request_publication_date: |
|
The present invention relates to a process for the purification of off-gases containing nitrogen oxides. An off-gas is passed through a reactor in admixture with ammonia or an ammonia precursor over a plurality of spaced catalyst beds under conditions to reduce the nitrogen oxides to nitrogen gas while heat is liberated. After the gas stream has obtained a desired temperature, the gas flow is reversed.