Hannover 2020 – scientific programme

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P: Fachverband Plasmaphysik

P 10: Poster Session 2

P 10.18: Poster

Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof

CO2 conversion and energy efficiency of a microwave plasma torch — •Katharina Wiegers, Irina Kistner, Andreas Schulz, Matthias Walker, and Günter Tovar — Institute of Interfacial Process Engineering and Plasma Technology IGVP, University of Stuttgart, Stuttgart, Germany

Mankind nowadays is strongly affected by the ongoing climate change which is caused mainly by the increasing emission of carbon dioxide (CO2) from e.g. traffic, coal power plants and industry. An inherent problem of the energy production by renewable sources such as photovoltaics and wind mills is the often observed discrepancy between actual energy "production" and energy demand, due to their discontinuous availability. The so-called "excess" energy can be used to operate a microwave plasma torch at atmospheric pressure. The CO2 plasma leads to the formation of carbon monoxide (CO) and oxygen radicals (O). To avoid the thermodynamically forced recombination of both back to CO2, when leaving the plasma state an effective separation process is required. The separation is achieved by ceramic hollow fibers. The remaining CO can be used as an important chemical C1-building block, which can be further employed for creating molecules with a higher commercial value. This work is focused on the conversion and energy efficiency of the CO2 plasma by different process parameters like microwave power, gas flow and distance from inside the plasma to the afterglow. The efficiencies are determined via FT-IR and mass spectrometry.