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Although pulsed corona technology for air purification is widely investigated by the lab experiments, large-scale application has yet to be proven. Industrial systems require large flow handling and thus, high corona power. An autonomous semi-industrial scale pilot wire-cylinder type corona reactor has been constructed for air purification demonstrations. The reactor is powered by a 10-kW spark gap-based pulsed power supply, capable of generating 60-kV 100-ns wide pulses with 1-kHz repetition rate. The pulses are optionally superimposed on a 0–30-kV dc bias to enable electrostatic precipitation. The system has been successfully applied during several field and lab experiments. Conversion data as a function of energy density are presented for ${rm NO}_{x}$, ${rm NH}_{3}$, ${rm H}_{2}{rm S}$, toluene, limonene, and fine dust removal. The system proves feasibility of large-scale air purification by pulsed corona.

Gas discharges in supercritical fluids are an excellent candidate for high-power switching duty. Experimental and theoretical research has been performed. We present an analysis of results and a quick comparison with SF 6 and CO 2 .

Important aspects of pulsed power processing that up to now received little attention are opened and summarized. A start is made in dealing with these aspects. They can be summarized as matching power source to process by controlling the global parameters impedance, time distribution, energy distribution and spatial distribution. An application is presented that can help changing the future of the energy policy: direct conversion of renewable power into fuels.