Göttingen 2025 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 8: Atmospheric Plasmas and their Applications III

P 8.1: Hauptvortrag

Dienstag, 1. April 2025, 13:45–14:15, ZHG006

Status and outlook for CO₂ conversion with microwave plasmas — •Ante Hecimovic, Christian K. Kiefer, Arne Meindl, Rodrigo Antunes, and Ursel Fantz — Max Planck Institute for Plasma Physics, Boltzmannstr. 2, D85748 Garching b. München

Carbon dioxide (CO₂) gas is regarded as a valuable building block in a non-fossil fuel economy, and if captured from the atmosphere it allows creating a closed carbon cycle, leading to net zero emissions. Low temperature plasmas have the potential to contribute to the field of CO₂ utilization through unique reaction pathways that are not accessible by other conversion technologies. The reaction pathways in the plasma can be driven either by electrons, a combination of electron-driven and heavy species driven mechanisms, or by elevated temperatures (2000-6000 K). In this contribution, conversion of CO₂ into CO using the microwave plasmas in large pressure range (1-1000 mbar) is presented, demonstrating effect of these mechanism on the achieved conversions. Relatively high conversion rates obtained in the microwave plasmas could potentially be applied in an industrial process. Two main obstacles towards the application: gas separation in the plasma effluent, and up-scaling towards CO flow rates compatible with the Fischer-Tropsch process are discussed.

Keywords: Microwave plasmas; CO2 conversion; Gas conversion