Nitrogen Fixation Process Based On Dielectric-enhanced DBD Non-thermal Plasma

Renewable energy sources,such as sunlight and wind,have been received massive investments for their huge reserves and environmental benefits.However,dut to weak integration with current electric system,a significant fraction of renewable energy power plants's electricity production is wasted.Chemical energy storage is a feasible solution for utilizing over-produced electricity,concerning chemical selection,NH₃ and NO_x are not only valuable products,but also serves as important roles in global hunger relief.Nowadays,the production of NH₃ and NO_x is dominated by Haber-Bosch?H-B?process,which consumes 1²%of global total energy and releases over 300 million tons of CO₂.Therefore,it is necessary to search for an alternative nitrogen fixation process that is energy-efficient,environment-friendly and can be easily integrade into power plants.Nitrogen fixation process based on non-thermal plasma?NTP?is more efficient than H-B process?theoratically?,it works under ambient pressure and temperature and uses electricity as energy source,moreover,its production scale can vary depending on conditions.But plasma reactions are not easy to control,which results in limited nitrogen fixation efficiency in practical event.Catalysts offer an approach to enhance the performance of NTP nitrogen fixation.The focus of this thesis was to investigate the impacts of catalysts on the NTP nitrogen fixation process.In this thesis,we started with the operating principles of different NTP generators and experiment setup,followed by catalysts preparation and extensive material characterizations,a theoretical model and electrical/optical characterizations were used to study the influences of catalysts on plasma generation.Lowest energy consumption of 70MJ/mol was obtained under 70 V input voltage,708 mL/min input flowrate and MnOx?x=2,1.5?catalyst.At last,we proposed a possible common property of good catalysts for NTP nitrogen fixation based on the measured data.