SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 11: Poster I

P 11.4: Poster

Mittwoch, 22. März 2023, 14:00–15:30, HSZ EG

Combining a nanosecond-pulsed DBD with an electrolytic cell to reduce CO₂ and N₂ — •Martin Leander Marxen¹, Luka Hansen¹, Gustav Sievers², Volker Brüser², and Holger Kersten¹ — ¹Plasmatechnology Group, Institute of Experimental and Applied Physics, Kiel University (CAU), Kiel, Germany — ²Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany

Plasma-catalytic approaches are promising for converting mixtures of CO₂ or N₂ with H₂ at mild conditions (ambient pressure and low temperatures) into higher-value gases or fuels such as syngas (CO + H₂), methanol (CH₃OH) or ammonia (NH₃)^[1]. Activation of the strong chemical bonds in CO₂ and N₂ is achieved by collisions of the molecules with energetic electrons present in the discharge.

In a polymer electrolyte membrane (PEM) cell^[2], oxygen ions (O²⁻) and protons (H⁺) are produced in the anode space. The protons permeate the membrane and adsorb on the cathode. By locating a custom nanosecond-pulsed DBD in the cathode space (as proposed in this contribution), the adsorbed hydrogen can directly be utilized for reducing activated CO₂ or N₂ species. This has two major advantages compared to other plama-catalytic approaches: First, hydrogen is produced in place. Second, the power supplied to the plasma is mainly used to activate the CO₂ or N₂ bonds instead of activating H₂ bonds as well.

[1] A. Bogaerts et al., J Phys D Appl Phys 53 (2020) 443001

[2] S. Shiva Kumar, V. Himabindu, Mater Sci Energy Technol 2 (2019) 442-454