Hannover 2020 – scientific programme

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P: Fachverband Plasmaphysik

P 10: Poster Session 2

P 10.19: Poster

Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof

Ro-vibrational excitation measurement in transient ns-discharges by multiple optical diagnostics — •Yanjun Du, Dirk Luggenhölscher, and Uwe Czarnetzki — Institute for Plasma and Atomic Physics, Ruhr University Bochum, D-44780 Bochum, Germany

CO₂ conversion is of growing interest in the context of greenhouse gas abatement and renewable energy exploration. The non-thermal plasma is promising means for efficient conversion since the unique electron, vibrational, rotational and gas temperatures in these plasmas allow focusing the discharge energy to the desired channels instead of heating the gas. Specifically, the vibrational excitation can lower activation barriers for direct dissociation and, thus, improve the final energy efficiency. This project aims at a fundamental understanding of the vibrational-stimulated CO₂ conversion by providing detailed experimental data. ns-pulsed atmospheric pressure plasma jets will be used to achieve independent control of plasma generation and molecular excitation by separating the relevant time scales. The evolution of the ro-vibrational distribution of both symmetric and asymmetric vibrational modes in CO₂ can be monitored by TDLAS at 2285 cm⁻¹. The plasma condition can be examined by temporally and spatially resolved optical emission spectroscopy. Here results from these investigations will be presented and discussed. The investigations are supported by the Alexander von Humboldt Foundation and the DFG in the frame of the CRC 1316.