Promoting volatile organic compounds removal by a magnetically assisted nanosecond pulsed gear‐cylinder dielectric barrier discharge

Abstract

In this study, a magnetic field perpendicular to the electric field is introduced to the gear-cylinder dielectric barrier discharge (DBD) to enhance the plasma density and improve the volatile organic compounds removal performance at atmospheric pressure. Higher discharge intensity, enlarged plasma streamers region, and better toluene removal performance are obtained after introducing a 0.2 T magnetic field

Magnetic field improves ozone production in an atmospheric pressure surface dielectric barrier discharge: understanding the physico-chemical mechanism behind low energy consumption

“…5 also supported this inference, where the ε increased by 0.1–0.3 eV (1 eV = 11604 K) after introducing the magnetic field, while the T g increased by only 10–20 K. The similar variation trends in ε and T g had also been reported by others. 28,52…”

“…5 also supported this inference, where the e increased by 0.1-0.3 eV (1 eV = 11604 K) after introducing the magnetic field, while the T g increased by only 10-20 K. The similar variation trends in e and T g had also been reported by others. 28,52 a The unit of k is m 3 s À1 and m 6 s À1 , respectively, for the two-body reaction and three-body reaction; the electron energy e and gas temperature T g are expressed in eV and K, respectively. Secondly, the effects of voltage and frequency on micro physico-chemical processes for generating O 3 in SDBD were considered as follows.…”

“…26 It changes the electron path to increase the collision frequency and leads to the increase of electron density and the promotion of the electron avalanche process, thus improving the discharge morphology and enhancing the discharge intensity to increase the discharge area and electron energy. 27,28 The increased collision frequency also promotes the generation of reactive species. 29,30 The change of electron motion state inevitably affects the transient species such as oxygen atom O generated by the electron collision reaction, and thus spontaneously affects O 3 whose dominant generation pathway is the three-body collision reaction involving O, O 2 , and ambient particles.…”

Time-resolved characteristics of a nanosecond pulsed multi-hollow needle plate packed bed dielectric barrier discharge

“…However, the difference is that the surface streamer under nitrogen has a narrower channel diameter than that under air in PD. This is because the photoionization range under nitrogen is shorter than that under air, thus a narrower streamer channel diameter is required to provide sufficient field enhancement for streamer propagation [31]. Additionally, the discharge under air starts at 15 ns, approximately 5 ns earlier than that under nitrogen.…”