Nitric Oxide Generator Based on Pulsed Arc Discharge

The aim of this study is to investigate the effect of the intermediate frequency (1-10 kHz) of the sinusoidal driving voltage on the characteristics of a developed surface dielectric barrier discharge (SDBD)-based reactor having spikes on its discharge electrode. Moreover, its influence on the production of ozone and nitrogen oxide byproducts is evaluated. The results show that SDBD is operated in the filamentary mode at all the frequencies. Nevertheless, the pulses of the discharge current at high frequencies are much denser and have higher amplitudes than those at low frequencies. The analysis of the power consumed in the reactor shows that a small portion of the input power is dissipated in the dielectric material of SDBD source, whereas the major part of the power is consumed in the plasma discharge. The results of the ozone production show that higher frequencies have a slightly adverse effect on the ozone production at relatively high energy density values, where the ozone concentration is slightly decreased when the frequency is increased at the same energy density. The temperature of the discharge channels and gas is not a crucial factor for the decomposition of ozone in this reactor, while the results of the measurements of nitrogen oxides characteristics 2 indicate that the formation of NO and NO 2 has a significant adverse effect on the production efficiency of ozone due to their oxidation to another nitrogen oxides and their catalytic effect.

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“…These compounds are generated by the following reactions of nitrogen molecules or atoms with oxygen atoms or molecules [51][52][53][54]:…”

Section: Nitrogen Byproductsmentioning

confidence: 99%

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Abdelaziz

Ishijima

Seto

et al. 2016

Plasma Sources Sci. Technol.

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“…Other investigations have used specific ratios of nitrogen and oxygen mixtures in their starting gaseous environment, which led to the intentional production of nitric oxide [27]. This concept was expanded upon leading to the proposal of a nitric oxide generator for therapeutic purposes [28]. Characterization of plasma constituents is critical, if mechanisms for observed results are to be postulated with accuracy.…”

Section: Plasma Spectra Characteristicsmentioning

confidence: 99%

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

Ferrell¹,

Aleks²,

Galov³

et al. 2013

J Biotechnol Biomaterial

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The glow discharge from a novel spark-based nonthermal plasma generator is described and characterized using spectrophotometry, radiometry and gas detectors. Spectral information identified ultraviolet radiation within the plasma discharge. High levels of reactive oxygen and nitrogenous species were also detected within the analyzed plasma. The plasma discharge is found to have a significant germicidal effect on Gram-positive bacteria, independent of temperature increase. The ultraviolet radiation and ionized gaseous species are found to contribute to this observed effect, synergistically. Plasma filtration reduced germicidal survivability significantly. The liquid environment in which bacterial cells were exposed to the nonthermal plasma also was important, when determining the efficacy of nonthermal plasma, as a germicidal agent. Staphylococcus aureus cultures exposed to nonthermal plasma for two minutes within low nutrient sources, such as water or phosphate-buffered saline, had very low survival. Cultures exposed to the same plasma interval in nutrient rich liquids tolerated the plasma exposure better, and survived at higher numbers. This plasma discharge is highly bactericidal, due to the high concentrations of known antimicrobial agents, but its effectiveness is subject to a synergistic effect, that depends upon the surrounding environment.

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“…From the aforementioned reasoning, it is of interest to compare the conditions of NO generation in our experiments with the conditions in the papers [43] and [44], where the high-current spark discharge with a duration of about several microseconds had been used. A typical energy in the spark was of 5 J at a pulse-repetition rate of 2 Hz.…”

Section: Resultsmentioning

confidence: 99%

“…Among the active particles, the molecules of nitrogen oxides and ozone have a significant place, particularly for the biomedical applications. Nitric monoxide is widely used in inhalation therapy because it has a relaxing effect on the blood vessels [43], [44]. The flows of nitrogen oxides and ozone generated in the plasma jets are applied for disinfection of wounds and skin wound healing [45].…”

mentioning

confidence: 99%

“…The flows of nitrogen oxides and ozone generated in the plasma jets are applied for disinfection of wounds and skin wound healing [45]. Correspondingly, different types of gas discharge in air and oxygen/nitrogen flow have been proposed for production of these particles, for example, a high-current spark discharge in a regime pulse-repetition rate [43], [44], a gliding arc discharge [46], and a microwave discharge powered by a frequency of 2.4 GHz [45].…”

mentioning

confidence: 99%

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Low-Current Plasmatron as a Source of Nitrogen Oxide Molecules

Korolev

Франц

Landl

et al. 2012

IEEE Trans. Plasma Sci.

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This paper describes a usage of a low-current coaxial plasmatron for generation of nitrogen oxide molecules. Glow-type discharge in vortex air flow is sustained at an average current from 0.05 to 0.2 A that corresponds to an average discharge power from 65 to 160 W. The diameter of an exit nozzle of the plasmatron is of 0.5 cm, and the air flow is varied from 0.2 to 1.5 g/s. In such conditions, the discharge burns in nonsteady-state regime, when a sustainment of a plasma jet/plume and a plasma column in the plasmatron nozzle is accompanied by the spontaneous glow-tospark transitions. Due to the special design of the anode nozzle, an efficient interaction of the air flow with the plasma plume and plasma column is provided. Typical contents of nitric monoxide in the output gas are of about several grams per cubic meter, and the cost for formation of one molecule is from 50 to 35 eV.

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Nitric Oxide Generator Based on Pulsed Arc Discharge

Cited by 25 publications

References 8 publications

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Characterization of surface dielectric barrier discharge influenced by intermediate frequency for ozone production

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

Low-Current Plasmatron as a Source of Nitrogen Oxide Molecules

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