Patent ID: 8025781

Claim:
A system for chemically modifying material from, or suspended within, gases or fumes fed through a filter, from an inlet side of the filter to an outlet side of the filter, the system comprising: a first electrode system positioned at the inlet side of the filter, the first electrode system comprising a first group of electrodes located at the inlet side of the filter, the electrodes of the first group of electrodes each being covered with a dielectric barrier; and a second electrode system positioned at the outlet side of the filter, the second electrode system comprising a second group of electrodes located at the outlet side of the filter, the electrodes of the second group of electrodes being not covered with a dielectric barrier, and the first group of electrodes and the second group of electrodes being connected to voltage sources to facilitate applying an electric field from the inlet side of the filter to the outlet side of the filter by means of a high voltage between the first group of electrodes and the second group of electrodes, wherein in operation the filter being submitted to an electric plasma having a plasma density such that the plasma density of the electric plasma is maximal at the inlet side of the filter.