SMuK 2023 – scientific programme

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P: Fachverband Plasmaphysik

P 11: Poster I

P 11.2: Poster

Wednesday, March 22, 2023, 14:00–15:30, HSZ EG

Inverstigation on methanol synthesis with a microwave plasma torch — •Marc Bresser, Katharina Wiegers, Andreas Schulz, Matthias Walker, and Günter Tovar — IGVP, University of Stuttgart, Germany

Due to the increasing concentration of carbon dioxide (CO₂) in the atmosphere and the resulting impact on climate change, possibilities are being sought to remove CO₂ from air by direct air capturing and a subsequent reuse of CO₂. In addition, the chemical industry is heavily dependent on fossil fuels and is looking for new ways to generate sustainable base chemicals. A possible renewable way to form carbon-based products is to use CO₂ as a reactant for the production of the base chemical methanol. Renewable methanol synthesis could be achieved via a microwave plasma process using electricity from renewable sources and "green" hydrogen (H₂). A CO₂ plasma forms carbon monoxide (CO) and oxygen (O₂).The oxygen is extracted via ceramic hollow fibers from the plasma. The addition of H₂ to the CO₂ plasma leads to the formation of new molecules such as methanol. The methanol can be separated by condensation of the exhaust gas. In this work, the CO₂ conversion in a microwave plasma (2.45 GHz) is studied. In dependence of the gas flow and the microwave power (up to 6 kW) the exhaust gas composition is analyzed with a Fourier-transform infrared spectroscopy (FTIR). Optical emission spectroscopy (OES) in the range from UV to IR is used to investigate the influence of the added H₂ onto the plasma gas composition and the exhaust gas stream.