München 2019 – scientific programme

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.47: Poster

Thursday, March 21, 2019, 16:30–18:30, Foyer Audimax

Assessment of the impact of Penning dissociation of CO₂ in a non-equilibrium atmospheric pressure plasma jet — •Christoph Stewig, Theresa Urbanietz, Steffen Schüttler, Volker Schulz-von der Gathen, Marc Böke, and Achim von Keudell — Research Department Plasmas with Complex Interactions, Experimental Physics II - Reactive Plasmas, Ruhr-Universität Bochum, D-44780 Bochum, Germany

The storage of renewable energies into chemical fuels due to the dissociation of CO₂ has been an inspiring idea for years. The utilization of a non-equilibrium plasma allows a degradation of the activation barrier of the required chemical reactions, thus potentially yielding to more energy efficient processes.

The observed conversion rates of up to 57% in an atmospheric helium RF plasma jet cannot be solely explained by the electron induced excitation transfer within the plasma. Therefore, other processes like the Penning dissociation, due to metastable noble gas molecules, must be considered.

The utilization of different helium-argon plasma compositions and its impact on the CO₂ excitation and dissociation is analysed with Fourier transform infrared spectroscopy and compared to the estimates based on simple global models.