Optical absorption spectroscopy of reactive oxygen and nitrogen species in a surface dielectric barrier discharge

  • A twin surface dielectric barrier discharge (SDBD) ignited in a dry synthetic air gas stream is studied regarding the formation of reactive oxygen and nitrogen species (RONS) and their impact on the conversion of admixed n-butane. The discharge is driven by a damped sinusoidal voltage waveform at peak-to-peak amplitudes of 8 kV\(_pp\)–13 kV\(_pp\) and pulse repetition frequencies of 250 Hz–4000 Hz. Absolute densities of O\(_3\), NO\(_2\), NO\(_3\), as well as estimates of the sum of the densities of N\(_2\)O\(_4\) and N\(_2\)O\(_5\) are determined temporally resolved by means of optical absorption spectroscopy using a laser driven broadband light source, suitable interference filters, and a photodiode detector. The measured densities are acquired across the center of the reactor chamber as well as at the outlet of the chamber. The temporal and spatial evolution of the species' densities is correlated to the conversion of n-butane at concentrations of 50 ppm and 400 ppm, measured by means of flame ionization detectors. The n-butane is admixed either before or after the reactor chamber, in order to separate the impact of short- and long-lived reactive species on the conversion process. It is found that, despite the stationary conversion at the selected operating points, at higher voltages and repetition frequencies the densities of the measured species are not in steady state. Based on the produced results it is presumed that the presence of n-butane modifies the formation and consumption pathways of O\(_3\). At the same time, there is no significant impact on the formation of dinitrogen oxides (N\(_2\)O\(_4\) and N\(_2\)O\(_5\)). Furthermore, a comparatively high conversion of n-butane, when admixed at the outlet of the reactor chamber is observed. These findings are discussed together with known rate coefficients for the reactions of n-butane with selected RONS.

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Author:Lars SchückeORCiDGND, Arisa BodnarGND, Niklas FriedrichsGND, Alexander BöddeckerORCiDGND, Niklas PetersGND, Kevin OllegottGND, Christian Oberste-BeulmannGND, Philipp WirthGND, Ryan Thomas Nguyen-SmithORCiDGND, Ihor KorolovORCiDGND, Andrew R. GibsonORCiDGND, Martin MuhlerORCiDGND, Peter AwakowiczORCiDGND
Parent Title (English):Journal of physics / D, Applied physics
Publisher:IOP Publishing
Place of publication:Bristol, Vereinigtes Königreich
Document Type:Article
Date of Publication (online):2024/02/16
Date of first Publication:2022/02/28
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:dielectric barrier discharge; nitrogen metastables; optical absorption spectroscopy; ozone; reactive oxygen and nitrogen species; volatile organic compounds
Issue:21, Artikel 215205
First Page:215205-1
Last Page:215205-16
Institutes/Facilities:Lehrstuhl für Allgemeine Elektrotechnik und Plasmatechnik
Lehrstuhl für Technische Chemie, Laboratory of Industrial Chemistry
Lehrstuhl für Allgemeine Elektrotechnik und Plasmatechnik, Research Group for Biomedical Plasma Technology
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Elektrotechnik, Elektronik
open_access (DINI-Set):open_access
faculties:Fakultät für Elektrotechnik und Informationstechnik
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International