The paper presents results of toluene decomposition performed in a gliding discharge reactor with a conical chamber and six high-voltage electrodes. The electrodes of this plasma reactor are supplied by a 6-phase ferro-resonance system composed of resonant capacitors and stray inductances of the high voltage transformers supplied from a digital inverter. The overall toluene conversion mainly depended on the initial C7H8 concentration and gas flow rate. It was possible to achieve a complete toluene conversion. Moreover, soot or higher hydrocarbons were not formed in this large-scale gliding discharge reactor. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.