Dielectric barrier discharges used for the conversion of greenhouse gases: modeling the plasma chemistry by fluid simulations

Bie, Christophe De; Martens, Tom; Dijk, Jan van; Paulussen, Sabine; Verheyde, Bert; Corthals, Steven; Bogaerts, Annemie

doi:10.1088/0963-0252/20/2/024008

Cited by 46 publications

(36 citation statements)

References 41 publications

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“…4. These species are generated by radical coupling reactions in the plasma volume; this has been demonstrated previously in experimental [31,32] and simulated [33,34] results for CH 4 DBDs in the absence of active metal catalysts. Fig.…”

Section: Plasma Catalyst Reduction In Chsupporting

confidence: 53%

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

Gallon

Twigg

et al. 2011

Applied Catalysis B: Environmental

111

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a b s t r a c tThe low temperature reduction of a NiO catalyst by CH 4 was performed in a coaxial double dielectric barrier discharge (DBD) reactor for the first time. The reduction involves active surface carbon which is produced via plasma decomposition of CH 4 . On the reduced Ni catalyst, activation of CH 4 and its fragments to form H 2 and carbon nanofibres occurred at 330 • C. CH 4 conversions of 37% were achieved in the plasmacatalytic reaction at atmospheric pressure, with 99% selectivity towards H 2 and solid carbon. These results demonstrate a synergistic effect where both the plasma and catalyst are vital for the production of H 2 and carbon nanofibres. In the absence of the catalyst stable plasma could not be ignited with a pure CH 4 flow and thermal studies showed that in the absence of the plasma CH 4 conversion was minimal.

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Section: Plasma Catalyst Reduction In Chsupporting

confidence: 53%

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

Gallon

Twigg

et al. 2011

Applied Catalysis B: Environmental

111

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“…However, we did not observe this under our non‐thermal plasma conditions, where CH 4 conversions were between ∼2 to 10 times greater than CO 2 conversions. This indicates that more product channels exist for CH 4 conversion such as electron‐impact dissociation of CH 4 to generate CH 3 , CH 2 and CH (Equation (10)–(12)), with subsequent radical recombination reactions to form higher hydrocarbons or further electron‐impact dissociation of radicals 46, 47. Direct plasma CH 4 decomposition driven by electron and surface reaction could also occur generating H 2 and solid carbon (Equation (13)).…”

Section: Resultsmentioning

confidence: 99%

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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“…Plasmas are complex media where several hundred reactions of production and consumption can occur [28,29]. The most plausible mechanisms for the formation and consumption of intermediate and value-added products in the CO2/CH4 gas mixture are listed in Table 2.…”

Section: Overview Of the Important Reactionsmentioning

confidence: 99%

CO2–CH4 conversion and syngas formation at atmospheric pressure using a multi-electrode dielectric barrier discharge

Ozkan

Dufour

Arnoult

et al. 2015

Journal of CO2 Utilization

105

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The conversion of CO2 and CH4 into value-added chemicals is studied in a new geometry of a dielectric barrier discharge (DBD) with multi-electrodes, dedicated to the treatment of high gas flow rates. Gas chromatography is used to define the CO2 and CH4 conversion as well as the yields of the products of decomposition (CO, O2 and H2) and of recombination (C2H4, C2H6 and CH2O). The influence of three parameters is investigated on the conversion: the CO2 and CH4 flow rates, the plasma power and the nature of the carrier gas (argon or helium). The energy efficiency of the CO2 conversion is estimated and compared with those of similar atmospheric plasma sources. Our DBD reactor shows a good compromise between a good energy efficiency and the treatment of a large CO2 flow rate.

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Dielectric barrier discharges used for the conversion of greenhouse gases: modeling the plasma chemistry by fluid simulations

Cited by 46 publications

References 41 publications

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

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

CO2–CH4 conversion and syngas formation at atmospheric pressure using a multi-electrode dielectric barrier discharge

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Dielectric barrier discharges used for the conversion of greenhouse gases: modeling the plasma chemistry by fluid simulations

Cited by 46 publications

References 41 publications

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

Plasma-assisted methane reduction of a NiO catalyst—Low temperature activation of methane and formation of carbon nanofibres

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

CO2–CH4 conversion and syngas formation at atmospheric pressure using a multi-electrode dielectric barrier discharge

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