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P: Fachverband Plasmaphysik

P 17: Poster II

P 17.10: Poster

Freitag, 3. September 2021, 14:00–16:00, P

Plasma catalytic synergies of a non-equilibrium atmospheric pressure plasma jet and MnO₂ surface catalyst — •Christoph Stewig, Theresa Urbanietz, Laura Chauvet, Marc Böke, and Achim von Keudell — Ruhr-University-Bochum, Germany

Plasma catalysis has the goal to exploit potential synergies between plasma and surface catalytic reactions. With the advent of renewable energies, this could allow the utilization of excess electrical energy to produce value-added molecules and thus provide the chemical industry with important reactants or store this energy.

Potential synergetic effects are: (i) a reduction or prevention of catalyst poisoning due to a cleaning of the catalyst surface, hence (ii) a lowering of the catalyst activation temperature, and (iii) an increase in the catalyst activity due to the creation of additional reactive sites by the plasma. (iv) finally, specific molecular excitations could promote specific surface reactions.

Due to the temperature dependence of surface catalysis, it is necessary to avoid intense surface heating. Thus, we employ a RF driven temperature-controlled capacity coupled plasma jet. Fourier Transformed Infrared Spectroscopy (FTIR) measurements are conducted in the plasma and yield information on the excitation and density of noble gas diluted molecules like CO₂ or n-butane.

The effect of an MnO₂ surface catalyst for temperatures between 20^∘C and 200^∘C on the dissociation of CO₂ and n-butan is presented.