Influence of humidity on the plasma-assisted CO₂ conversion

The current research focuses on carbon dioxide (CO₂) conversion at ambient conditions using streamer plasma. In this study, treatment time and humidity have been found to influence CO₂ conversion. Our findings reveal a maximum CO₂ conversion rate of 35.2%, achieved with a remarkably high energy efficiency of CO₂ conversion at 135% and a low energy cost of 2.17 eV/molecule. We employed optical emission and fourier-transform infrared spectroscopy spectroscopy to analyze the different dissociation products of CO₂ and determine the percentage of CO₂ conversion. Furthermore, we utilized a two-dimensional (2D) fluid dynamics model and a zero-dimensional (0D) chemistry model to gain insights into the reactor mechanism.