München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 9: Atmospheric Pressure Plasmas II - Helmholtz Graduate School III

P 9.4: Vortrag

Dienstag, 19. März 2019, 12:00–12:15, HS 21

Influence of a catalyst on CO2 dissociation in a non-equilibrium atmospheric pressure helium plasma jet — •Theresa Urbanietz, Steffen Schüttler, Christoph Stewig, Marc Böke, Volker Schulz-von-der-Gathen, and Achim von Keudell — Experimental Physics II, Ruhr-University Bochum, 44780 Bochum

Excitation of CO2 in an atmospheric pressure plasma may be an energy efficient method to generate solar fuels from renewable energies. The non-equilibrium excitation of specific states of the molecules in the plasma can cause of high energy efficiency. The influence of a catalyst can even enhance the energy and dissociation efficiency. The dissociation of CO2 in an atmospheric helium RF plasma jet in the presence of a catalyst is analyzed for varying absorbed plasma powers and compared with measurements without catalyst. Fourier transform infrared spectroscopy is used to evaluate the concentration of CO2 and CO as well as the rotational and vibrational temperature of the species. A strong non-equilibrium excitation of CO2 and CO with rotational temperatures around 400 K and vibrational temperatures up to 1600 K has been found. The dependence of these excitation temperatures on the plasma power is rather weak.

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