Electrodeless discharge at atmospheric pressure
US6204605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Mar 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/246
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Voltage is applied to conducting loops wrapped around the outside of a non-conducting chamber (e.g., a glass tube) to generate a capacitively coupled discharge plasma inside the chamber. In one embodiment, a seed gas is injected into the chamber through an inlet in an otherwise closed end of the chamber, while the other end is open to the ambient atmosphere. In such an embodiment, the seed gas is used to ignite the plasma in air at essentially atmospheric pressure. The present invention has different applications, including, but not limited to, (a) passivating toxic or polluting gases that are injected into the chamber along with the seed gas and (b) treating materials placed within a second chamber that is connected to the open end of the plasma-generating chamber such that active species migrate into the second chamber to interact with the materials placed therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.