Corona-induced chemical scrubber for the control of NOx emissions
US6193934A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Sep 22, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/1943
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An emission treatment system for removing oxides of nitrogen (NO.sub.x), from flue gases includes in the pretreatment portion a continuous plasma reactor receiving and modifying the gaseous effluent by applying a plasma discharge thereto. The plasma discharge, upon application to the gaseous effluent, decomposes the majority of the gaseous effluent to nitrogen and oxygen and oxidizes nitric oxide to nitrogen dioxide. A preconditioning section is also provided for further modifying the gaseous effluent by washing the same with a mildly alkaline solution for removing ozone and lowering the process temperature. A continuous chemical scrubber uses an absorbent medium to substantially eliminate the nitrogen dioxide from the effluent and releases nitrogen and oxygen to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.