Everyone is familiar with static electricity that occurs when reaching for a metal door handle
after walking across a carpet. In technical terms, static electricity is the discharge of electricity
that occurs when the potential (that is, voltage) exceeds the insulating effect of the air gap
between your finger and the door handle. Non-thermal plasma uses a reactor that utilizes a
similar effect. The reactor consists of two electrodes (one electrode is in the form of a metal
pipe, and the other electrode is a metal wire that runs down the middle of the pipe) separated by
a void space that is lined with a dielectric material and is filled with glass beads. This type of
reactor is called Dielectric-Barrier Discharge (DBD). See Figure 1