Effect of dielectric parameters on the transformation of operation mode and the energy cost of nitrogen fixation of surface microdischarge in air

In this study, we examine the effect of dielectric parameters (permittivity of the dielectric sheet epsilon d and thickness of the dielectric sheet dd) on the operational mode transformation and energy cost of nitrogen fixation in surface microdischarge (SMD). Three dielectric materials with different thicknesses were used. It was found that dd has a negative correlation with the power consumption, while a larger epsilon d could effectively lower the applied voltage for mode transformation and decrease the energy cost. The trend of energy cost has the shape of a checkmark symbol (root), and the lowest energy cost in this investigation was 489.07 GJ/tN. Increasing epsilon d and reducing dd could further decrease the energy cost in SMD. Finally, the mechanism was briefly discussed.