Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Dwivedi, Charu; Toley, Madhu A.; Dey, G.R.; Das, Tomi Nath

doi:10.1080/01919512.2012.758022

Cited by 14 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relative to that in the empty-bed reactor, the 'average width' of the discharge gap in the DBD reactor was reduced by packing particles; that is, the packing particles occupied part of the discharge gap volume, increasing the surface area of the medium and the pore structure complex; moreover, the formation of more micro-discharges contributed to the efficiency of ozone synthesis [22,29]. The O 3 concentration also increased, consistent with the results reported in the literature [30,31]. When particles were added into the DBD gap, the electric field intensity of the discharge area was altered, enhancing the discharge effect; meanwhile, the original discharge electric field was distorted [32].…”

Section: Experimental Setup and Methodssupporting

confidence: 86%

“…When particles were added into the DBD gap, the electric field intensity of the discharge area was altered, enhancing the discharge effect; meanwhile, the original discharge electric field was distorted [32]. The difference in the degree of distortion was attributable to the difference in packing materials [31,33]. The relative dielectric constant of ZrO 2 is 27, and that of Al 2 O 3 is 9.2.…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study on the parameter optimization and application of a packed-bed dielectric barrier discharge reactor in diesel particulate filter regeneration

Shi

Cai

2021

Plasma Sci. Technol.

View full text Add to dashboard Cite

To compensate for the shortcomings of the thermal and catalytic regeneration of the diesel particulate filter (DPF), a self-designed packed-bed dielectric barrier discharge (DBD) reactor for DPF regeneration was developed. The DBD reactor with the main active substance of nonthermal plasma (NTP) as the target parameter was optimized by adjusting the feed gas, packing particles (material or size), and cooling water temperature. Moreover, a set of optimal working parameters (gas source, O 2 ; packing particles, 1.2-1.4 mm ZrO 2 ; and cooling water temperature, 20 °C) was selected to evaluate the effect of different O 3 concentrations on DPF regeneration. The research results showed that selecting packing particles with high dielectric constant and large particles, as well as reducing the cooling water temperature, with oxygen as the feed gas, contributed to an increase in O 3 concentration. During DPF regeneration, the following changes were observed: the power of the NTP reactor decreased to lower than 100 W, the O 3 concentration increased from 15 g m −3 to 45 g m −3 , the CO and CO 2 volume fractions of the particulate matter decomposition products increased, and the peak regeneration temperature increased to 173.4 °C. The peak temperature arrival time was 60 min earlier, indicating that the regeneration rate of DPF increased with the increase in O 3 concentration. However, the O 3 utilization rate (the amount of carbon deposit removed per unit volume O 3 ) initially increased and then decreased; when the O 3 concentration was set to 25 g m −3 , the highest O 3 utilization rate was reached. The packed-bed DBD technology contributed to the increase in the concentration of NTP active substances and the regeneration efficiency of DPF. It provides a theoretical and experimental basis for high-efficiency regeneration of DPF at low temperatures (<200 °C).

show abstract

Section: Experimental Setup and Methodssupporting

confidence: 86%

Section: Experimental Setup and Methodsmentioning

confidence: 99%

Experimental study on the parameter optimization and application of a packed-bed dielectric barrier discharge reactor in diesel particulate filter regeneration

Shi

Cai

2021

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Solid Materials Intended to Be Used as the Bed in a DBD Reactor DBD reactors and the application of non-thermal plasma are normally used for ozone generation, material treatment, particle reduction from exhaust, removal of NO X , CO X , particulate matter, pollutants, etc. [19][20][21][22][23][24][25]. Naturally, the selection of bed materials varies as per their respective application.…”

Section: Present Literaturementioning

confidence: 99%

Characteristics of Generic Dielectric Materials and Char as Bed Materials of a Dielectric Barrier Discharge Reactor under High Temperature and Wide Frequency Range

Arumugam

Schröder²,

Schoenemann

et al. 2022

Energies

View full text Add to dashboard Cite

This paper investigates the characteristics of generic dielectric materials and char, which are intended to be used as the fixed bed materials of a non-thermal-plasma (NTP)-based dielectric barrier discharge (DBD) reactor. Such data are very essential when upgrading the fixed bed to a fluidised bed, which may provide further improvement in the production and quality of the producer gas. This measure would eventually cause a better producer gas and effective biomass-based power generation. Pertinent data that are currently available focus on either improving the design requirements of the producer gas or studying the impact of individual dielectric-material-specific applications to produce useful gases by decomposing the polluting gases. Considering that there has only been a meagre attempt to gather this information, this study gains its importance. In this context, the collective electrical behaviour of bed materials viz. quartz-sand, olivine, and char under ambient and higher temperatures is recorded and their frequency dependencies are analysed. First, the electrical behaviour of the chosen materials is resolved over a wide frequency range. For this purpose, two test cells, i.e., one for the ambient conditions and the other for higher temperatures, are built. Subsequently, the surface and volumetric properties of the chosen bed materials under ambient and higher temperatures are studied. As these materials are not as conductive as metal, such an approach is necessary to understand the apparent behaviour of the materials and anticipate their direct or indirect effects in the presence of non-thermal plasma. In summary, the data from the test cell under ambient and higher temperatures and the influence of materials in the dielectric barrier discharge reactor qualitatively define the material usage and may provide an opportunity to optimise their performance.

show abstract

“…Of the various DBD reactors, packed-bed reactors (PBRs) have flexible options for packing materials to remove pollutants (e.g. NO X , CO 2 , PM) or improve ozone synthesis [4][5][6][7][8]. Ray et al tested the conversion of CO 2 into CO by packing (glass beads, Al 2 O 3 , TiO 2 , CeO 2 ), and CeO 2 was found to result in the best conversion efficiency [9].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have reported that PBRs can improve energy efficiency, yet their behavior is poorly understood. The material properties, including the capacitance, dielectric constant, and shape factor, can affect the discharge phenomena within the packed bed [4][5][6][7][8][9][10][11][12]. As PBRs are highly complex systems with many parameters, the optical techniques that are commonly used in other DBD systems are difficult to diagnose PBRs.…”

Section: Introductionmentioning

confidence: 99%

Effects of packing particles on the partial discharge behavior and the electrical characterization of oxygen PBRs

Ni¹,

Cai²,

Shi³

et al. 2020

Plasma Sci. Technol.

View full text Add to dashboard Cite

Packed-bed reactors (PBRs) hold great promise for environmental applications, but a deeper understanding of the behavior of plasma discharge within PBRs is required. To this end, a partial-discharge alternative equivalent circuit for PBRs was established in this work. Dielectric particles (glass beads or glass sand) were used to place focus on the effects of the particle size and shape on the partial discharge behavior of the oxygen PBRs. Some electrical characterizations were explored (e.g. the effective dielectric capacitance, partial discharge coefficient, and corrected burning voltage) that may differ from long-standing interpretations. The findings indicate that the suppressive effect of surface discharge on filament discharge is stronger with the decrease of the particle size. For partial discharge, the effective dielectric capacitance is always less than the dielectric capacitance. The corrected burning voltage and partial discharge tendency increase with the decrease of the particle size. As compared to an empty reactor, the average electric field in the PBR was found to be improved by 3–4 times, and the ozone energy efficiency and production were promoted by more than 20% and 15%, respectively. The plasma processing capacity can therefore be improved by choosing a relatively large size or a complex, irregularly-shaped packing material that is suitable for the discharge gap.

show abstract

Ozone Generation from Argon-Oxygen Mixtures in Presence of Different Packing Materials within Dielectric Barrier Discharge Gap

Cited by 14 publications

References 38 publications

Experimental study on the parameter optimization and application of a packed-bed dielectric barrier discharge reactor in diesel particulate filter regeneration

Experimental study on the parameter optimization and application of a packed-bed dielectric barrier discharge reactor in diesel particulate filter regeneration

Characteristics of Generic Dielectric Materials and Char as Bed Materials of a Dielectric Barrier Discharge Reactor under High Temperature and Wide Frequency Range

Effects of packing particles on the partial discharge behavior and the electrical characterization of oxygen PBRs

Contact Info

Product

Resources

About