SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 11: Poster I

P 11.7: Poster

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

Development of plasma reactors for plasma-assisted catalysis — •Kerstin Sgonina, Alexander Quack, and Jan Benedikt — Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany

The energy efficient and decentralized performance of catalytic reactions, such as for the production of ammonia, has become even more important nowadays. Plasma-assisted catalysis can help to achieve these goals as it is available on demand and works without enormous external heating. Non-equilibrium atmospheric pressure plasmas are used to dissociate gaseous molecules, which can then react at the surface of the catalyst to form the desired products. Plasma-assisted catalysis reactors at atmospheric pressure are often realized by packed bed reactors, in which the catalyst is packed into or deposited on millimeter-sized spheres. However, these millimeter-sized spheres are not feasible for all types of possible catalysts.

Therefore, different plasma reactors for plasma-assisted catalysis were developed and tested with and without different catalysts for in-plasma catalysis, where the catalyst is in direct contact with plasma, and post-plasma catalysis, where only reactive species from the plasma are reaching the catalyst. Dielectric barrier discharges operated at kHz- or radio-frequencies are used for ammonia synthesis using N₂ and H₂ as working gas as well as for methane formation experiments using CO₂ and H₂. Depending on the reactor-type and working gas, the gas temperature during plasma operation ranges from room temperature up to 200 ^∘C.