Dissociation of carbon-dioxide at high-pressure using nanosecond-pulsed dielectric barrier discharges

This study investigates the efficiency of the conversion of CO$_{2}$ into CO and O$_{2}$ using nanosecond repetitively pulsed discharges in a high pressure reactor capable of exceeding the supercritical point. The electrode configuration consists of a pin-to-plane geometry with the plane electrode covered by dielectric material (SiO$_{2})$. The products of CO$_{2}$ splitting are measured using mass spectrometry. The energy efficiency is determined for a range of residence times, pulse frequency and energy, and reactor pressures. The extent of CO$_{2}$ conversion is found to be dependent on the duration of the processing time, reaching an equilibrium level that is linearly-dependent on the discharge pulse energy. The results are compared with our previous experiment conducted in the absence of the dielectric layer.