Method and means for chemically modifying gases or fumes
US8025781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Jul 28, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S422/906
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method and means for modifying gases or fumes fed through a filter (1), from its inlet side to its outlet side, submitted to an electric plasma having its maximum plasma density (d) at the filter's inlet side. The gases or fumes may comprise NOx, the filter being constituted by a catalytic material fit for modifying NOx. The filter also may be polluted with e.g. a soot deposit, precipitated on the filter's surface and/or within the filter's interior. The means may comprise a first electrode system (2) at the filter's inlet side and a second electrode system (3) at the filter's outlet side, connected to a high voltage (V1). Preferably the first electrode system comprises two or more groups of interlacing electrodes, each connected to a high voltage source (V1, V2, V3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.