Plasma-catalytic ammonia synthesis in a dielectric barrier discharge reactor: A combined experimental study and kinetic modeling

Plasma-catalytic ammonia synthesis in a dielectric barrier discharge reactor has emerged as possible route for electrification of nitrogen fixation. In this study, we use combination experiments and plasma kinetic model to investigate the from N2 H2, both with without solid packing material zone. The effect power, feed flow rate, N2:H2 ratio, gas residence time, temperature, (MgAl2O4 alone or impregnated Co Ru) on rate were examined experiments. was employed improve our understanding formation pathways identify changes these when altering ratio. A higher NH3 achieved increasing well temperature 100 200 °C present plasma. At elevated °C, an optimum observed at equimolar ratio (N2:H2 = 1:1) MgAl2O4, while N2-rich favored Ru/MgAl2O4 Co/MgAl2O4. feed, where high energy electrons are more likely collide N2, suggests that rate-limiting step is dissociation phase. This supported by used. However, alone, found only limiting H2-rich feeds, whereas limited access H feeds makes hydrogenation N species limiting.