Non-thermal plasma generation by using back corona discharge on catalyst

Feng, Fada; Ye, Lingling; Liu, Ji; Yan, Keping

doi:10.1016/j.elstat.2012.11.034

Cited by 28 publications

(17 citation statements)

References 19 publications

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“…Plasma jets, corona discharges [ 30 ], and barrier discharges have been applied therapeutically [ 31 ]. Plasma jets can generate a column of plasma outside of electrodes into the surrounding area in a highly controlled manner, thus playing a crucial role in applications in the medical field.…”

Section: Sources Of Ros In Dentistrymentioning

confidence: 99%

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Generation and Role of Reactive Oxygen and Nitrogen Species Induced by Plasma, Lasers, Chemical Agents, and Other Systems in Dentistry

Jha

Ryu

Choi

et al. 2017

Oxidative Medicine and Cellular Longevity

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The generation of reactive oxygen and nitrogen species (RONS) has been found to occur during inflammatory procedures, during cell ischemia, and in various crucial developmental processes such as cell differentiation and along cell signaling pathways. The most common sources of intracellular RONS are the mitochondrial electron transport system, NADH oxidase, and cytochrome P450. In this review, we analyzed the extracellular and intracellular sources of reactive species, their cell signaling pathways, the mechanisms of action, and their positive and negative effects in the dental field. In dentistry, ROS can be found—in lasers, photosensitizers, bleaching agents, cold plasma, and even resin cements, all of which contribute to the generation and prevalence of ROS. Nonthermal plasma has been used as a source of ROS for biomedical applications and has the potential for use with dental stem cells as well. There are different types of dental stem cells, but their therapeutic use remains largely untapped, with the focus currently on only periodontal ligament stem cells. More research is necessary in this area, including studies about ROS mechanisms with dental cells, along with the utilization of reactive species in redox medicine. Such studies will help to provide successful treatment modalities for various diseases.

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Section: Sources Of Ros In Dentistrymentioning

confidence: 99%

“…Low-pressure plasmas are known to generate very high concentrations of reactive species. Nonthermal plasma involves mostly electrons that are energized with no significant heating of ions or the constituent gases within [ 30 ].…”

Section: Sources Of Ros In Dentistrymentioning

confidence: 99%

Generation and Role of Reactive Oxygen and Nitrogen Species Induced by Plasma, Lasers, Chemical Agents, and Other Systems in Dentistry

Jha

Ryu

Choi

et al. 2017

Oxidative Medicine and Cellular Longevity

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“…Consequently, chemical reactions can take place at low operating temperatures. Many research works have reported that plasma-assisted catalyst systems result in the enhancement of reaction rates, selectivity, and yield, as well as energy utilization efficiency. − …”

Section: Introductionmentioning

confidence: 99%

Improvement of Ethylene Epoxidation in a Parallel Plate Dielectric Barrier Discharge System by Ethylene/Oxygen Separate Feed and Ag Catalyst

Suttikul

Paosombat

Santikunaporn

et al. 2014

Ind. Eng. Chem. Res.

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This work investigated ethylene epoxidation performance using a parallel plate dielectric barrier discharge (DBD) system with a separate ethylene/oxygen feed in order to produce oxygen active species prior to reaction with ethylene. The highest ethylene oxide (EO) selectivity of 73% was obtained when the combined catalytic−DBD system was operated at an ethylene feed position of 0.5, an O 2 /C 2 H 4 feed molar ratio of 0.2:1, and an Ag loading of 10 wt %. The presence of a glass platesupported Ag catalyst provided considerably higher EO selectivity, twice as much as that of the DBD system alone. As compared to the DBD system with an Ag catalyst supported on glass beads, the glass plate dielectric barrier was found to be a more efficient support for ethylene epoxidation. This is because the glass plate system provided plasma that was more uniform than that provided by the glass bead system.

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“…23,24,37 In the treatment of VOCs with BCD, organic aerosols, the major byproduct, can adhere to the surface of the catalyst and be decomposed by the plasmaassisted catalysis process. 26 Figure 5 shows the effect of BCD on the grade collection efficiency of fly ash samples. The initial total particle concentration was 30.9 mg/m 3 .…”

Section: Environmental Science and Technologymentioning

confidence: 99%

“…25−28 BCD not only has the potential to activate the catalyst but also has a further advantage in that aerosols, the major byproduct of VOC treatment by the plasma method, can be captured on the catalyst surface and broken down into CO 2 and H 2 O by plasma and catalytic oxidation. 26 BCD can be easily induced using normal high-voltage DC power sources, which are very reliable and inexpensive, and therefore, it has the potential for application in industrial-scale VOC treatment.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Back Corona Discharge in a Honeycomb Catalyst and Its Application for Treatment of Volatile Organic Compounds

Feng

Zheng

Shen

et al. 2015

Environ. Sci. Technol.

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The main technical challenges for the treatment of volatile organic compounds (VOCs) with plasma-assisted catalysis in industrial applications are large volume plasma generation under atmospheric pressure, byproduct control, and aerosol collection. To solve these problems, a back corona discharge (BCD) configuration has been designed to evenly generate nonthermal plasma in a honeycomb catalyst. Voltage-current curves, discharge images, and emission spectra have been used to characterize the plasma. Grade particle collection results and flow field visualization in the discharge zones show not only that the particles can be collected efficiently, but also that the pressure drop of the catalyst layer is relatively low. A three-stage plasma-assisted catalysis system, comprising a dielectric barrier discharge (DBD) stage, BCD stage, and catalyst stage, was built to evaluate toluene treatment performance by BCD. The ozone analysis results indicate that BCD enhances the ozone decomposition by collecting aerosols and protecting the Ag-Mn-O catalyst downstream from aerosol contamination. The GC and FTIR results show that BCD contributes to toluene removal, especially when the specific energy input is low, and the total removal efficiency reaches almost 100%. Furthermore, this removal results in the emission of fewer byproducts.

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Non-thermal plasma generation by using back corona discharge on catalyst

Cited by 28 publications

References 19 publications

Generation and Role of Reactive Oxygen and Nitrogen Species Induced by Plasma, Lasers, Chemical Agents, and Other Systems in Dentistry

Generation and Role of Reactive Oxygen and Nitrogen Species Induced by Plasma, Lasers, Chemical Agents, and Other Systems in Dentistry

Improvement of Ethylene Epoxidation in a Parallel Plate Dielectric Barrier Discharge System by Ethylene/Oxygen Separate Feed and Ag Catalyst

Characteristics of Back Corona Discharge in a Honeycomb Catalyst and Its Application for Treatment of Volatile Organic Compounds

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