Process for the removal of nitrogen oxides from off-gases
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
US 5401479 A |
| Номер заявки (21): |
906,918 |
| Дата подачи заявки (22): |
21 авг. 1992 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
28 мар. 1995 г. |
| Дата публикации заявки (43): |
|
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.