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P: Fachverband Plasmaphysik

P 10: Poster Session I

P 10.8: Poster

Dienstag, 1. April 2025, 16:15–18:15, ZHG Foyer 1. OG

Spatially resolved optical emission spectroscopy on a dielectric barrier discharge for plasma-assisted catalysis — •Kerstin Sgonina¹, Alexander Quack¹, and Jan Benedikt^{1, 2} — ¹Institute of Experimental and Applied Physics, Kiel University, Germany — ²Kiel Nano, Surface and Interface Science (KiNSIS), Kiel University, Germany

Energy efficient and decentralized performance of catalytic reactions for the means of converting excess energy into chemicals is one of the important research topics nowadays. Plasma-assisted catalysis could provide one possible solution as it is available on demand and works even without external heating. Non-equilibrium atmospheric pressure plasmas are used to dissociate and excite gaseous molecules, which can then react at the surface of the catalyst to form the desired products. For efficient plasma-assisted catalysis reactions, the fast product removal is crucial, which can be achieved by specific reactor designs or tailored materials. A reactor was designed aiming the fast product removal and enabling testing powder-like and porous materials for their catalytic effect. Spatially resolved optical emission spectroscopy was used to analyze the discharge properties and structure, and to study the role of the catalyst in the process. The dielectric barrier discharge is operated at different frequencies and voltage amplitudes. By using CO₂ and H₂, the methane formation is investigated via mass spectrometry.

Keywords: plasma catalysis; dielectric barrier discharge; optical emission spectroscopy