Methane conversion in homogeneous discharge at atmospheric pressure in Ar-CH 4 mixtures

International audienceUV pre-ionized photo-triggered discharge reactor is used, its allows to work with an homogeneous plasma, a uniform electric field and a controllable deposition of electric energy in the plasma even at atmospheric pressure. The moderate values of the reduced electric field E/N, associated with the preceding properties, allows a 0D self-consistent physical and chemical modelling, without restrictive hypothesis on the physics of the energy deposition. Initial methane concentrations are in the range 250-1000 ppm at atmospheric pressure, chromatographic diagnostics are used to identify and quantify CH 4 and by-products

Naphthalene oxidation by different non-thermal electrical discharges at atmospheric pressure

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Real time analysis of toluene degradation in a dielectric barrier discharge plasma

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OH kinetics in photo-triggered discharges used for VOCs conversion

The kinetic of the hydroxyl radical is studied in N2/O2/H2O mixtures with small amounts of acetone or isopropyl alcohol (0.5%). The radical density is measured in absolute value in the afterglow of a photo-triggered discharge, which generates an homogeneous transient non-equilibrium plasma, using a time resolved absorption measurement method. For dry mixtures, experimental results are compared to predictions of a self-consistent 0D discharge and kinetic model. It is shown that dissociation of the VOCs through quenching collisions of nitrogen metastable states plays an important role in the production of OH. Measurements can not be explained looking only at the oxidation of acetone or IPA by the oxygen atom. This result is reinforced by experimental results about the OH density in wet mixtures, with or without VOCs, compared to dry ones

Odorous volatile compounds conversion by electro-ceramic barrier discharge

International audienceDecomposition of butyric acid and dimethyl sulphide diluted in dry air is studied in coaxial cylindrical geometry of Electro-ceramic Barrier Discharge (EBD). Removal rates are measured for different initial concentrations and electrical parameters. By products are identified using FTIR spectroscopy and PTR-MS diagnostic

N-hexane abatement using a non-thermal plasma

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Real-time analysis of toluene removal in dry air by a dielectric barrier discharge using proton transfer reaction mass spectrometry

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Insights into non-thermal plasma chemistry of acetone diluted in N-2/O-2 mixtures: a real-time MS experiment

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