Introduction of Al2O3 Rods into DBD for CO2 Conversion: Understanding the Synergistic Effect of Plasma-Catalysis

Packed bed plasma reactors (PBPRs) are gaining increasing interest for environmental applications as they improve the product selectivity and enhance conversion efficiency compared to a non-packed reactor. However, the disordered discharge gaps among the packing materials result in complicated electrical and optical characteristics of plasma, leading to the interaction between the plasma and packing materials is not well understood. Here we first introduce the Al
₂
O
₃
rods as the packing material, which apply uniform distributed, by means of 3D printed holder, for keeping the identical plasma characteristics of each rod. And the plasma generation on the surface of rod can be observed in a visualize PBPRs. The effect of the number of rods on the plasma reactivity, optical and electrical characteristics were studied detailed by using CO
₂
as the inlet gas and AC supply.