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P: Fachverband Plasmaphysik

P 6: Poster I

P 6.3: Poster

Montag, 26. Februar 2024, 16:30–18:30, ELP 6: Foyer

Kinetic Modeling of the Chemical and Physical Mechanisms in a Rf Plasma Combined with a Catalyst — •Fatma-Nur Seferoglu¹, Dirk Reiser¹, Achim Von Keudell², and Christian Linsmeier¹ — ¹Forschungszentrum Jülich Gmbh, Jülich, Germany — ²Ruhr-Universität Bochum, Bochum, Germany

Plasma driven catalysis is a promising method for addressing environmental challenges, particularly in the removal of volatile organic compounds (VOC), the reduction of nitrogen oxides and the oxidation of hydrocarbons. The oxidation of n-butane is often used as a benchmark for the efficiency of a catalytic system to remove VOC. However, the description of the chemical and physical mechanisms of plasma catalytic processes can be very challenging due to the high number of possible reaction pathways. On the one hand, the plasma changes the surface coverage of the catalyst and on the other hand, the catalyst influences the variety of the plasma species, i.e. due to desorption of species from the catalytic surface.

This work presents an approach to model the species concentration in a radiofrequency atmospheric pressure plasma combined with a manganese dioxide catalyst and to identify the most effective reaction pathways. In the experiment, the plasma channel is filled with different admixtures of carbon dioxide diluted in helium to investigate the dissociation and recombination of molecules using fourier-transform infrared spectroscopy. For better understanding of the chemical and physical mechanisms in the plasma catalytic system, more gas phase and surface reactions will be tested.

Keywords: plasma catalysis; radiofrequency plasma; voc removal; reaction kinetic model; ftir spectroscopy