Non-thermal plasma (NTP) technology is sufficient for treatment of atmospheric mercury pollution, in which ozone usually acts as the key reactive species for oxidation of elemental mercury (Hg0). We focus in this work on the critical power supply parameters including voltage, frequency, and pulse width in a nanosecond pulsed corona discharge system and sys-tematically investigate their influence on both Hg0 oxidation and ozone generation under varying discharge conditions. Experimental results demonstrate that increasing the pulse voltage significantly enhances the discharge intensity and the generation of reactive species, thereby raising the Hg0 oxidation rate to above 90%. Increasing the discharge frequency leads to a higher overall energy input per unit time and promotes ozone formation, and further improves Hg0 oxidation efficiency, although the energy per pulse reduces slightly. But changing the pulse width in range of 400–2000 ns, the Hg0 oxidation rate exhibits only minor variation, remaining nearly constant approximately 90%. These findings provide a theoretical basis and parameter optimization strategy for the industrial application of non-thermal plasma in at-mospheric mercury pollution control.
Junfeng Wang，Zhuo Wang，Feng Liu，Yang Chen，Jiting Ouyang (Wed,) studied this question.