Kinetics of ozone and nitric oxides in dielectric barrier discharges in O2/NOxand N2/O2/NOxmixtures

Stefanović, Ilija; Bibinov, Nikita; Deryugin, A A; Vinogradov, I. P.; Napartovich, A. P.; Wiesemann, K.

doi:10.1088/0963-0252/10/3/303

Cited by 109 publications

(81 citation statements)

References 21 publications

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“…Holzer et al (2002) reported that short-lived reactive species are also formed in the pore volume of porous material as well as in the gas phase when exposed to the plasma. In addition, plasma discharge can lead to local heating of the catalyst surface and the activation of lattice O 2 (Stefanovic et al 2001). The local heating naturally facilitates the catalytic reactions.…”

Section: Resultsmentioning

confidence: 99%

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Gandhi

Mok

2013

Int. J. Environ. Sci. Technol.

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The performance of 1,1,1,2-tetrafluoroethane or HFC-134a decomposition and the formation of byproducts in a dielectric barrier discharge plasma reactor were studied with different packing systems such as a-Al 2 O 3 (porous and nonporous), c-Al 2 O 3 (porous) and ZrO 2 (nonporous). Experimental variables such as reactor temperature, initial HFC-134a concentration and oxygen levels were chosen for the performance analysis. Among the packing systems, the porous c-Al 2 O 3 and a-Al 2 O 3 decomposed HFC-134a much more effectively than the nonporous a-Al 2 O 3 and ZrO 2 . The combination of the plasma with the porous cAl 2 O 3 was found to cover a wide range of initial concentration. The decomposition efficiency tended to increase with the addition of oxygen up to 2 %, but further increase in the oxygen led to a decrease. As well as carbon oxides (CO 2 and CO), significant amounts of unwanted byproducts such as COF 2 and CF 4 were also identified in the effluent gas with the nonporous a-Al 2 O 3 and ZrO 2 . On the contrary, with the porous c-Al 2 O 3 and a-Al 2 O 3 , such unwanted byproducts were considerably suppressed, enhancing the formation of CO 2 and CO.

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Section: Resultsmentioning

confidence: 99%

Effect of packing materials on the decomposition of tetrafluoroethane in a packed-bed dielectric barrier discharge plasma reactor

Gandhi

Mok

2013

Int. J. Environ. Sci. Technol.

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“…Mathematical models simulating the chemical yield of reactive species from a surface DBD plasma sometimes do not take into account the convective mechanisms [52][53][54][55], but this work shows how important they can actually be. The convective mechanism induced by the air jet is also generating a region with a negative pressure gradient above the exposed electrode.…”

Section: Discussionmentioning

confidence: 99%

Geometry optimization of linear and annular plasma synthetic jet actuators

Neretti¹,

Seri²,

Taglioli³

et al. 2016

J. Phys. D: Appl. Phys.

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The Electro-Hydro-Dynamic (EHD) interaction induced in atmospheric-pressure air by a surface Dielectric Barrier Discharge (DBD) actuator has been experimentally investigated. Plasma Synthetic Jets Actuators (PSJAs) are DBD actuators able to induce an air stream, perpendicular to the actuator surface. These devices can be used in the aerodynamics field to prevent or induce flow separation, modify the laminar to turbulent transition inside the boundary layer, and stabilize or mix air flows. They can also be used to enhance indirect plasma treatment effects, increasing the reactive species delivery rate onto surfaces and liquids. This can play a major role in plasma processing and chemical kinetics modelling, where only diffusive mechanisms are often considered. This paper reports on the importance that different electrode geometries can have on the performance of different PSJAs. A series of DBD aerodynamic actuators designed to produce perpendicular jets have been fabricated on 2-layer printed circuit boards (PCBs). Linear and annular geometries have been considered, testing different upper electrode distances in the linear case and different diameters in the annular one. AC voltage supplied at 11.5 kV peak and 5 kHz frequency has been used. Lower electrodes were connected to ground and buried in epoxy resin to avoid undesired plasma generation on the lower actuator surface.Voltage and current measurements have been carried out to evaluate the active power delivered to the discharges. Schlieren imaging allowed to visualize the induced jets and gave an estimate of their evolution and geometry. Pitot tube measurements were performed to obtain the PSJAs' velocity profiles and to estimate the mechanical power delivered to the fluid.Optimal values of the inter-electrode distance and diameter have been found in order to maximize jet velocity, mechanical power or efficiency. Annular geometries are found to achieve the best performances.

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“…Nitric oxide and ozone are produced in subsequent chemical reactions (Rajasekaran, 2009) in the discharge as well as in the afterglow phase. Chemical kinetic model of atmospheric pressure DBD in air consists of great number of reactions (Stefanovic, 2001). In the simulation presented here, we include chemical reactions (see Table 1) concerning the production and destruction of nitric oxide and ozone.…”

Section: Simulation Of Chemical Kineticsmentioning

confidence: 99%