München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.39: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Characterisation of a 2.45 GHz microwave atmospheric pressure plasma torch in N2 and CO2 — •Federico Antonio D’Isa1, Ante Hecimovic1, Emile Carbone1, Ursel Fantz1, Irina Kistner2, Andreas Schulz2, and Matthias Walker21Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany — 2Institute of Interfacial Process Engineering and Plasma Technology, Pfaffenwaldring 31, 70569 Stuttgart, Germany

Plasma technology can be used for conversion of (renewable) energy into value added chemicals through activation of chemical processes or direct conversion of raw carbon materials (e.g. CO2, CH4, biogas, biomass). Microwave plasmas combine the advantage of fast response to the grid power oscillation with a relatively high energy (up to 80 %) and conversion (up to 80 %) efficiencies, albeit at reduced pressure. In this work we present results obtained in a microwave plasma torch at atmospheric pressure (2.45 GHz, up to 3 kW). The plasma torch is a custom made microwave resonator consisting of a coaxial and cylindrical resonator. The plasma is confined in a quartz tube (inner diameter of 26 mm) placed in the centre of the resonator with a tangential gas inlets generating a vortex flow. The N2 and CO2 plasmas have been investigated by OES (rotational and vibrational temperatures), mass spectrometry (conversion and energy efficiency), ICCD imaging (plasma size and dynamics). ICCD images are compared to gas flow simulations to understand the gas dynamic in a vortex configuration. The focus of the work is on characterisation of the plasma in an effort towards higher conversion and energy efficient source.

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