SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 5: Atmospheric Pressure Plasmas and their Applications I

P 5.6: Vortrag

Dienstag, 21. März 2023, 12:30–12:45, CHE/0089

Evaluation of an electron beam sustained atmospheric pressure plasma for the conversion of carbon dioxide — •Lars Dincklage¹, Burkhard Zimmermann¹, Gösta Mattausch¹, and Ronny Brandenburg^2,3 — ¹1Fraunhofer Institute for Org. Electr., EB and Plasma Technol. FEP, Dresden, Germany — ²Leibniz-Institute for Plasma Science and Technology, Greifswald, Germany — ³University of Rostock, Germany

Carbon dioxide (CO₂) conversion processes will play an important role in closed carbon cycles for zero carbon emission economies in the future. Even though plasmas exhibit numerous technical advantages, they are not yet economically feasible in terms of CO₂ conversion, since they struggle to simultaneously achieve high energy efficiency and high conversion degree for the splitting of CO₂ molecules and are often bound to sub-atmospheric pressures. Therefore, a new hybrid approach for the plasma-chemical conversion of CO₂ is presented, consisting of an atmospheric pressure glow discharge sustained by an electron beam. This hybrid approach potentially allows to transfer energy from the plasma mainly into vibrational dissociation pathways by working at low reduced electric field strengths (about 20 Td), while sufficient ionization in the plasma is ensured by the electron beam. Based on this principle a reactor for gas conversion processes was developed. Furthermore, preparatory electron beam dose measurements for estimating ionization rates in the plasma were conducted and power deposition by the electric field and the electron beam into the plasma were calculated for continuous and pulsed operation modes.