Research on the synergistic catalytic conversion of CO₂ and its mechanism in a novel gliding arc plasma fluidized bed

In the context of the increasingly severe global climate change, the efficient conversion and utilization of CO₂ have become a research hotspot. This study first investigated the coupled reaction system (GD-C) of gliding arc plasma and catalyst fluidized bed under the plasma catalytic (IPC) configuration. To overcome the limitations of this system, we further developed and studied the magnetic acceleration gliding arc plasma coupled with a catalyst fluidized bed (MAGD-C) system, aiming to enhance CO₂ conversion efficiency and energy efficiency. Through the introduction of variables such as current, catalyst, and magnetic acceleration, the study investigates the effects of plasma discharge characteristics, catalyst action, and magnetic field regulation on the conversion of CO₂. The results demonstrate that the coupling of gliding arc plasma and catalyst fluidized bed exerts a dual effect. On one hand, the chemical activity on the catalyst surface facilitates the conversion of CO₂. On the other hand, the particle-arc interaction results in a reduction in discharge power and gas processing volume, thereby impacting the conversion efficiency. The MAGD-C configuration, which employs magnetic acceleration, significantly enhances discharge power, discharge frequency, and gas processing volume. Experimental data indicate that at a current of 50 mA, compared to conventional gliding arc plasma, the CO₂ conversion rate in the MAGD-C configuration increased by 32.4 %, and energy efficiency improved by 32.3 %.