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Mainz 2022 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 7: Atmospheric Pressure Plasmas I

P 7.6: Vortrag

Dienstag, 29. März 2022, 15:15–15:30, P-H11

CO2 conversion in barrier discharges with and without packed bed filling at elevated pressures — •Rezvan Hosseini Rad1, Milko Schiorlin1, Volker Brüser1, and Ronny Brandenburg1,21Leibniz-Institute for Plasma Science and Technology — 2University of Rostock, Institute of Physics

A coaxial dielectric barrier discharge (DBD) reactor operated at elevated pressures up to 2 bar is investigated for the splitting of carbon dioxide. Electrical plasma parameters as well as concentraions of carbon monoxide as the main chemical product is studied without and with a packed bed (partially or fully) filling the reactors volume. A mixture Ar:CO2 = 4:1 is used as feed gas. Argon is admixed in order to reduce the breakdown voltage, thus, enabling also a stable plasma operation at the higher pressures. Increasing the pressure leads to an increase of the CO2 conversion and energy efficiency in case of empty as well as packed bed reactor. The energy efficiency is improved up to 31 % if the reactors volume is fully filled with glass beads with a CeO2 coating compared with the empty reactor. The chemical performance is correlated with the discharge distribution in the DBD reactor, deduced from electrical diagnostics.

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