SMuK 2021 – scientific programme

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P: Fachverband Plasmaphysik

P 17: Poster II

P 17.9: Poster

Friday, September 3, 2021, 14:00–16:00, P

Splitting of CO2 with negative nanosecond pulsed dielectric barrier discharge — •Sepideh Mousazadeh borghei, Raphael Rataj, Volker Brüser, and Juergen F Kolb — Leibniz Institute for Plasma Science and Technology (INP),Greifswald, Germany

Carbone dioxide, one of the inevitable by-products of human activities, is a notable contribution to the current climate change. Conversion of CO2 into value added chemicals and fuels namely CO and CH3OH has drawn remarkable attention as a potential solution. For the splitting of CO2 into CO and O2, harsh conditions are required, owing to the high stability of the CO2-bonds. Non-thermal plasma has provided an innovative way. The goal is to provide electrons with sufficient energy, i.e. temperature, while the gas temperature can remain close to room temperature. In the first step of our project, we studied the effects of gas flow rates and mixture ratios of CO2 with argon on CO2-splitting. Therefore, a cylindrical dielectric barrier discharge reactor was set up to investigate efficacies and efficiencies. The plasma was generated by the application of negative high voltage pulses of nominally -20 kV and a pulse duration of 500 ns to an inner rod-electrode that was insulated by a glass wall with gap distance of 4 mm from the surrounding grounded electrode with 90 mm in length. Pulse repetition rates were set to 1 kHz. Gas compositions after treatment were investigated by FTIR spectroscopy. The results demonstrated that the flow of the feed gases played a significant role in CO2-conversion. The highest conversion rate was achieved for the lowest flow rate of 30 sccm, yielding 6% of CO.