(Sub)nanosecond transient plasma for atmospheric plasma processing experiments: application to ozone generation and NO removal

Abstract

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Effective streamer discharge control by tailored nanosecond-pulsed high-voltage waveforms

“…In [14] we clearly found that the rise time of the pulse changes the ozone yield: the shorter the rise time, the higher the ozone yield. The difference between a 0.4 ns rise time and 5.6 ns rise time was around 50%.…”

“…Therefore, to compare our results with other plasma systems and to compare between different experimental settings in our measurements, we measure the ozone yield. It is generally understood that to assess the oxygenradical-generation performance of a plasma this ozone yield (in g kWh −1 ) is a good indicator, where the highest values in literature are around 200 g kWh −1 in air [14,16,17].…”

“…However, the pulses are also very different. In [14] we used pulses of just 9 ns long and had no clear secondary streamer phase.…”

“…The pulses we used in e.g. [14] (1-9 ns pulse duration, up to 45 kV amplitude), [34] (12 ns pulse duration, up to 20 kV amplitude) and [81] (7 ns pulse duration, up to 45 kV amplitude) all resulted in yields of over 150 g kWh −1 . What these pulses all had in common is that in the plasma reactor systems we applied them to, they all significantly exceeded the inception voltage (so the gap was over-volted).…”

High efficiency plasma treatment of water contaminated with organic compounds. Study of the degradation of ibuprofen

“…A computational study on the plasma remediation of N x O y from gas streams also concluded that efficiency improves when the energy is delivered in higher frequency pulses of smaller energy per pulse . However, for very short pulses (durations below 10 ns) it was observed that the NO removal yield decreases slightly with decreasing pulse duration, while the ozone yield is not significantly influenced by pulse length …”