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Title: Influence of the on-time on the ozone production in pulsed dielectric barrier discharges
Authors: Montazersadgh, Faraz
Wright, Alexander R.P.
Ren, Junchen
Shaw, Alexander H.
Neretti, Gabriele
Bandulasena, Hemaka C.H.
Iza, Felipe
Issue Date: 2019
Publisher: © The Authors. Published by MDPI AG
Citation: MONTAZERSADGH, F. ... et al., 2019. Influence of the on-time on the ozone production in pulsed dielectric barrier discharges. Plasma, 2(1), pp. 39 - 50.
Abstract: Understanding the production mechanisms of ozone and other reactive species in atmospheric pressure dielectric barrier discharges (DBDs) has become increasingly important for the optimization and commercial success of these plasma devices in emerging applications, such as plasma medicine, plasma agriculture, and plasma catalysis. In many of these applications, input power modulation is exploited as a means to maintain a low gas temperature. Although the chemical pathways leading to ozone production/destruction and their strong temperature dependence are relatively well understood, the effect of the on-time duration on the performance of these modulated DBDs remains largely unexplored. In this study, we use electrical and optical diagnostics, as well as computational methods, to assess the performance of a modulated DBD device. The well-established Lissajous method for measuring the power delivered to the discharge is not suitable for modulated DBDs because the transients generated at the beginning of each pulse become increasingly important in short on-time modulated plasmas. It is shown that for the same input power and modulation duty-cycle, shorter on-time pulses result in significantly enhanced ozone production, despite their operation at slightly higher temperatures. The key underpinning mechanism that causes this counter-intuitive observation is the more efficient net generation rate of ozone during the plasma on-time due to the lower accumulation of NO2 in the discharge volume.
Description: This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: A.W. would like to thank EPSRC (EP/M507908/1) for the studentship. A.W. & H.B. would like to thank Plants to Products BBSRC NIBB for funding (POC-HD_RD0300 C and BB/L013819/1).
Version: Published
DOI: 10.3390/plasma2010005
URI: https://dspace.lboro.ac.uk/2134/37285
Publisher Link: https://doi.org/10.3390/plasma2010005
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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