To utilize fuel gas obtained from biomass gasification for the production of energy or chemicals, it is necessary to clean the fuel gas. Especially heavy aromatic hydrocarbons ("tars") must be removed. This paper gives an overview of our work on tar removal from fuel gas by means of pulsed corona discharges. A setup for pulsed corona processing at fuel gas temperatures up to 850°C will be described. Experiments were done at gas temperatures up to 400°C. Effects of the gas temperature on the energization of a corona reactor and on tar removal will be discussed.