Smart Dielectric Barrier Discharge Plasma Decontamination: Spatially Targeted Decontamination With Actuated Ozone Distribution

Choudhury, Bhaswati; Portugal, Sherlie; Roy, Subrata; Mastro, Emma Noelle; Johnson, Judith A.

doi:10.3389/fphy.2022.834030

Cited by 10 publications

(27 citation statements)

References 47 publications

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“…(a) Comb reactor flow actuation showing the direction of three wall jets with the main wall jet flow from the shaft towards the teeth tips, (b) smoke flow visualization of Comb reactor actuated flow, (c) Fan reactor flow actuation by the fan blades which interacts to result in overall conical flow thrusted upwards from the reactor base, (d) smoke flow visualization of Fan reactor actuated flow. Figure adapted from previous publication [15].…”

Section: Methodsmentioning

confidence: 99%

Distributed Compact Plasma Reactor Sterilization for Planetary Protection in Space Missions

Choudhury

Revazishvili

Lozada³

et al. 2022

Preprint

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This paper presents a proof-of-concept study establishing effectiveness of the Active Plasma Sterilizer (APS) for sterilization in planetary protection. The APS uses Compact Portable Plasma Reactors (CPPRs) to produce surface dielectric barrier discharge, a type of cold plasma, using ambient air to generate and distribute reactive species like ozone used for decontamination. Sterilization tests were performed with pathogenic bacteria (Escherichia coli and Bacillus subtilis) on materials (Aluminum, Polycarbonate, Kevlar and Orthofabric) relevant to space missions. Results show that the APS can achieve 4 to 5 log reductions of pathogenic bacteria on four selected materials, simultaneously at 11 points within 30 minutes, using power of 13.2 +/- 2.22 W. Spatial sterilization data shows the APS can uniformly sterilize several areas of a contaminated surface within 30 minutes. Ozone penetration through Kevlar and Orthofabric layers was achieved using the CPPR with no external agent assisting penetration. Preliminary material compatibility tests with SEM analysis of the APS exposed materials showed no significant material damage. Thus, this study shows the potential of the APS as a light-weight sustainable sterilization technology for planetary protection with advantages of uniform spatial decontamination, low processing temperatures, low exposure times, material compatibility and the ability to disinfect porous surfaces.

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Section: Methodsmentioning

confidence: 99%

Distributed Compact Plasma Reactor Sterilization for Planetary Protection in Space Missions

Choudhury

Revazishvili

Lozada³

et al. 2022

Preprint

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“…A good example is the dynamic decontamination that considers SDBD actuation capabilities, and enhance decontamination through manipulation and utilization of the induced flow. Relevant work in this area includes [113], who used SDBD reactors specifically designed for the enhancement of the spatial and temporal distribution of oxygen and nitrogen species [115] to test local decontamination levels and developed integrated numerical simulation methods to predict localized or targeted decontamination. It was concluded that SDBD could be applied for decontamination of desired surface areas, thus reducing exposure times, dosage requirements of species like ozone, and energy consumption.…”

Section: On the Future Of Sdbd Technologymentioning

confidence: 99%

“…FIGURE 15Examples of dynamic decontamination introduced in[113, 114]. (A) Measurement planes P2 and P3 with measurement grid and reactor orientation used in the study of SDBD actuated distribution of Escherichia coli decontamination inside a chamber.…”

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confidence: 99%

“…Here, Ln: normalized log reduction; L min and L max : minimum and maximum log reduction achieved in each plane over all the repeats, respectively. σ standard deviation of the mean of normalized log reductions over the plane, indicating uniformity in decontamination distribution[113]. (F) Schematic of expected vortices from one, two, three, and six exposed electrodes in the cylindrical actuators.…”

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Advances on aerodynamic actuation induced by surface dielectric barrier discharges

2022

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Surface Dielectric Barrier Discharge (SDBD) is a well-known technology for active aerodynamic flow control with low power consumption. It is a type of plasma actuation for flow control with no moving parts and very fast response times. Research on SDBD flow control over the years has shown great potential for flow separation, boundary layer transition, drag reductions and suppression of local heating. A major area of research on SDBD flow control lies in increasing the effectiveness of SDBD actuators with new electrode configurations, surface materials, and plasma array designs. This review aims to provide a comprehensive report of research performed on SDBD flow control over the last 2 decades with a focus on SDBD reactor designs. Aspects of SDBD flow control including discharge morphology and actuation mechanism through momentum and energy transfer have been discussed in depth. Additionally, the future of research in SDBD actuated flow control has been explored. This review can serve as the baseline to develop new SDBD reactor designs for specific applications with improved effectiveness and advanced systems.

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“…For years, plasma properties such as electron temperature, Debye length, Debye number, electron density, and plasma frequency have been determined using OES. The Boltzmann plot method was used to calculate the electron temperature of plasma [10][11][12][13]:…”

Section: Introductionmentioning

confidence: 99%

Study the Effect of Dielectric Barrier Discharge (DBD) Plasma on the Decomposition of Volatile Organic Compounds

Farag

Kadhem

2022

IJP

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Recently, research has focused on non-thermal plasma (NTP) technologies as a way to remove volatile organic compounds from the air stream, due to its distinctive qualities, which include a quick reaction at room temperature. In this work, the properties of the plasma generated by the dielectric barrier discharge (DBD) system and by a glass insulator were studied. Plasma was generated at different voltages (3, 4, 6, 7, 8 kV ) with a fixed distance between the electrodes of 5 mm, and a constant argon gas flow rate of (2.5) I/min. DBD plasma emission spectra were recorded for each voltage. The Boltzmann plot method was used to calculate the electron temperature in the plasma ( ), and the Stark expansion method was used to calculate the electron density ( ). The decomposition of organic compounds (cyclohexane) was also studied using DBD plasma. The results showed that the potential difference between the two electrodes has a clear effect on the plasma parameters, as the temperature of the electrons and the density of electrons increase with the increase in the potential difference between the two electrodes. The DBD plasma system proved to be a good way to decompose volatile organic compounds, as the results proved the emission of hydrogen gas as one of the dissociation products of cyclohexane.

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Smart Dielectric Barrier Discharge Plasma Decontamination: Spatially Targeted Decontamination With Actuated Ozone Distribution

Cited by 10 publications

References 47 publications

Distributed Compact Plasma Reactor Sterilization for Planetary Protection in Space Missions

Distributed Compact Plasma Reactor Sterilization for Planetary Protection in Space Missions

Advances on aerodynamic actuation induced by surface dielectric barrier discharges

Study the Effect of Dielectric Barrier Discharge (DBD) Plasma on the Decomposition of Volatile Organic Compounds

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