Division of Environmental Physics - User: student
Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava

Dependence of the dissociative recombination coefficient of molecular ions Kr₂⁺ with electrons on the electron and gas temperature

Lukáč P., Mikuš O., Morva I., Zábudlá Z., Trnovec J., Morvová M., Hensel K.
Plasma Sources Sci. Technol. 21 (6), 065002, 7 pp (2012)

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Abstract:

Plasma catalysis has been utilized in many environmental applications for removal of various hydrocarbons including tars. The aim of this work was to study tars removal process by atmospheric pressure DBD non-thermal plasma generated in combination with packing materials of various composition and catalytic activity (TiO2, Pt/γAl2O3, BaTiO3, γAl2O3, ZrO2, glass beads), dielectric constant (5–4000), shape (spherical and cylindrical pellets and beads), size (3–5 mm in diameter, 3–8 mm in length) and specific surface area (37–150 m2/g). Naphthalene was chosen as a model tar compound. The experiments were performed at a temperature of 100°C and a naphthalene initial concentration of approx. 3000 ppm, i.e. under conditions that are usually less favorable to achieve high removal efficiencies. For the given specific input energy of 320 J/L, naphthalene removal efficiency followed a sequence: TiO2 > Pt/γAl2O3 > ZrO2 > γAl2O3 > glass beads > BaTiO3 > plasma only. The efficiency increased with the increasing specific surface area of a given packing material, while its shape and size were found also important. By-products of naphthalene decomposition were analyzed by means of FTIR spectrometry and surface of packing materials by SEM analysis.

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