Abstract: A reactor (100) for the plasma assisted processing of a gaseous medium, including a cylindrical bed (106) of active material (107) contained between two concentric electrodes (108, 109), both of which are earthed and with a third cylindrical electrode (111) concentric with the other electrodes positioned within the bed of active material (107) and connected to a high voltage input terminal (112).

Abstract: A reactor for the plasma-assisted processing of gaseous media comprising a reactor chamber including a gas permeable bed of active material, a power source for applying across the bed of active material a potential sufficient to establish a plasma in a gaseous medium flowing through the bed of active material and a chamber having an inlet stub and an outlet stub for constraining the gaseous medium to flow through the bed of active material, wherein the bed of active material comprises a matrix of beads of a dielectric material having an assembly of regular arrays of beads in each of which adjacent beads are connected to a high voltage input terminal or an electrical ground.