Plasma activated dissociation of CO$_{2}$ studied in a dielectric barrier discharge

The ever-increasing emission of carbon dioxide into the atmosphere as well as the intermittency problem of electricity produced by renewable energy sources are challenges that urgently need to be addressed. An approach addressing both issues at the same time is converting CO$_{2}$ to a fuel using plasma driven by electricity from renewable sources. We will present in this contribution the results of a study on the conversion of CO$_{2}$ to CO in a dielectric barrier discharge in pure CO$_{2}$ at pressures up to 1000 mbar: FTIR absorption and Raman spectroscopy were applied to measure CO number densities and gas temperatures as function of the specific injected energy. CO densities with a maximum at 10$^{18}$ cm$^{-3}$ (mixing ratio of 4.4{\%}) at 46 kJ/sl, energy efficiencies in the range of a few percent and gas temperatures up to 550 K were detected. The CO production is directly linked with the total number of transferred charges q during the residence time t$_{res}$ of CO$_{2}$ molecules. Also ozone has been detected with a maximum mixing ratio of 0.075{\%}.