Effect of packing solid material on characteristics of helium dielectric barrier discharge at atmospheric pressure

Tu, Xin; Verheyde, Bert; Corthals, Steven; Paulussen, Sabine; Sels, Bert F.

doi:10.1063/1.3619822

Cited by 63 publications

(43 citation statements)

References 22 publications

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“…46 In addition to undergoing this transition from single peak to multi-peak behaviour in the positive half cycle of applied voltage, the amplitude of the current pulses for DBD with partial packing also increases in comparison to DBD without any packing. This signifies a stronger discharge and is in accordance with previously reported studies, 16,41 where a slight increase in current amplitude is observed on use of catalyst packing.…”

Section: Resultssupporting

confidence: 80%

“…Helium DBD exhibiting multiple pulses in the discharge current profiles is said to be operating as pseudo-glow discharge. 45 Such an increase in current peaks on inclusion of catalyst packing in helium DBD has been previously observed by Tu et al 41 for a DBD with radial partial packing of Al 2 O 3 compared to DBD with no packing. Tu and Whitehead 16 also observed an increase in current pulses with radial and axial partial packing of Ni/c-Al 2 O 3 in co-axial DBD reactor during dry reforming of CH 4 .…”

Section: Resultsmentioning

confidence: 73%

“…The model developed in this study is first validated with an experimental result published in a previous study by Tu et al 41 for a helium DBD. Figure 3 shows the comparison of discharge current profiles obtained from an experimental study 41 with that predicted by the model developed in this study for a helium DBD with no packing with the same set of operating parameters and reactor geometry.…”

Section: Resultsmentioning

confidence: 89%

“…Figure 3 shows the comparison of discharge current profiles obtained from an experimental study 41 with that predicted by the model developed in this study for a helium DBD with no packing with the same set of operating parameters and reactor geometry. Since the 2D simulation is being performed on a small section of the coaxial DBD reactor, it should be noted that the predicted value of current obtained from the simulation needs to be multiplied by a factor to account for the total height and circumference of the reactor.…”

Section: Resultsmentioning

confidence: 99%

“…The increase in current pulses is typically attributed to the increase in charge density due to additional charge deposition on the surface of the catalyst packing material. 16,41 The discharge ignites once the gap voltage reaches the breakdown voltage and extinguishes once the gap voltage falls below the breakdown voltage. This is expressed in the current signal in the form of a peak.…”

Section: Resultsmentioning

confidence: 99%

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Fluid model for a partially packed dielectric barrier discharge plasma reactor

Gadkari

2017

Physics of Plasmas

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In this work, a two-dimensional numerical \ud fluid model is developed for a partially\ud packed dielectric barrier discharge (DBD) in pure helium. In\ud fluence of packing on\ud the discharge characteristics is studied by comparing the results of DBD with partial\ud packing with those obtained for DBD with no packing. In the axial partial packing\ud configuration studied in this work, the electric field strength was shown to be en\ud hanced at the top surface of the spherical packing material and at the contact points\ud between the packing and the dielectric layer. For each value of applied potential,\ud DBD with partial packing showed an increase in the number of pulses in the current\ud profile in the positive half cycle of the applied voltage, as compared to DBD with\ud no packing. Addition of partial packing to the plasma-alone DBD also led to an\ud increase in the electron and ion number densities at the moment of breakdown. The\ud time averaged electron energy profiles showed that a much higher range of electron\ud energy can be achieved with the use of partial packing as compared to no packing\ud in a DBD, at the same applied power. The spatially and time averaged values over\ud one voltage cycle also showed an increase in power density and electron energy on\ud inclusion of partial packing in the DBD. For the applied voltage parameters studied\ud in this work, the discharge was found to be consistently homogeneous and showed\ud the characteristics of atmospheric pressure glow discharge

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Fluid model for a partially packed dielectric barrier discharge plasma reactor

Gadkari

2017

Physics of Plasmas

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Low Temperature Sabatier CO₂ Methanation

Molinet‐Chinaglia,

Shafiq,

Serp

2024

ChemCatChem

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The CO2 methanation reaction, or Sabatier reaction, is experiencing renewed interest in the context of large‐scale recycling of point CO2 emissions, leading to the power‐to‐gas technology. The reaction represents a flexible route to transform CO2 into methane by hydrogenation with (green) dihydrogen. This exothermic transformation takes place at a reasonable rate at temperatures above 200 °C and is directed to the targeted product at low temperatures. The CO2 methanation nevertheless remains kinetically limited due to the chemical stability of CO2 and the high bond dissociation energy for C=O in CO2. Therefore, the current urgent demand is for the development of catalysts and associated processes with superior activity for CO2 activation at low temperatures. This critical review aims to overview the state of the art of this low‐temperature technology using thermal, plasma and photo‐assisted catalysis. We summarize research advances around low‐temperature CO2 methanation, focusing on catalyst formulations (metal, supports and promoters), reaction mechanisms and suitable activation processes. We discuss each of these critical aspects of the technology and identify the main challenges and opportunities for low temperature (≤ 200 °C) CO2 methanation.

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Effects of Reactor Packing Materials on H₂ Production by CO₂ Reforming of CH₄ in a Dielectric Barrier Discharge

Gallon

Whitehead

2011

Plasma Processes & Polymers

145

108

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Non‐thermal plasma has been investigated for CO2 reforming of CH4 in a coaxial DBD reactor with different reactor packing materials placed into the discharge gap. Both the chemical and physical effects on reaction performance have been examined for the addition of quartz wool, γ‐Al2O3 and zeolite 3A, in order to gain a better understanding of plasma interactions with materials during CH4 reforming reactions. Quartz wool was found to enhance the conversion of CH4 and improve H2 yields as a result of changes in the physical properties of the discharge; electrical measurements showed an increase in the intensity of microdischarge filaments over quartz wool. In the presence of Al2O3 and zeolite 3A, the discharge intensity was reduced and consequently CH4 and CO2 conversions were lower for these materials. However, in the presence of zeolite 3A improved selectivities towards H2 and light hydrocarbons acetylene/ethylene were obtained and formation of liquid hydrocarbons was inhibited due to shape‐selectivity determined by the zeolite pore size.

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Effect of packing solid material on characteristics of helium dielectric barrier discharge at atmospheric pressure

Cited by 63 publications

References 22 publications

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Low Temperature Sabatier CO₂ Methanation

Effects of Reactor Packing Materials on H₂ Production by CO₂ Reforming of CH₄ in a Dielectric Barrier Discharge

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Effect of packing solid material on characteristics of helium dielectric barrier discharge at atmospheric pressure

Cited by 63 publications

References 22 publications

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Low Temperature Sabatier CO2 Methanation

Effects of Reactor Packing Materials on H2 Production by CO2 Reforming of CH4 in a Dielectric Barrier Discharge

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Product

Resources

About

Low Temperature Sabatier CO₂ Methanation

Effects of Reactor Packing Materials on H₂ Production by CO₂ Reforming of CH₄ in a Dielectric Barrier Discharge