Author(s)

Qi Li, Na Liu, Sai Li, Yuhang Wang, Guangning Liao, Zeyi Xin

Corresponding Author

Na Liu

Abstract

Dielectric barrier discharge plasma (DBD) may directly convert CO2 into CO and O2 using a catalyst at ambient temperature and pressure. This study investigated the effect of iron foam filled into a DBD reactor on CO2 conversion efficiency. As input power rises, the CO2 conversion rate escalates. In comparison to the empty reactor, iron foam markedly enhances CO2 conversion performance, achieving a CO2 conversion rate of up to 30% and an energy efficiency of up to 2.0%. The thermal stability of the iron foam was evaluated at 80 W power, revealing that it could sustain high catalytic activity for an extended duration. Furthermore, residence time also significantly influences CO2 conversion. The CO2 conversion rate progressively rises with extended residence time, whilst energy efficiency diminishes. Nevertheless, during brief residence time, energy efficiency may attain as much as 3.5%.

Keywords

Non-thermal plasma; DBD; CO2 conversion; Iron foam; Stability