Study Of Ammonia Synthesis By Means Of High Pressure Non-equilibrium Plasma Chemistry

Following the key NSFC Project "Studies of Method and Application of Gas Molecules Ionized with Strong Electric at High Pressure Field" and the NSFC Project "Studies on Dissociation of Gas Molecules by Ultra-strong Electric Field Discharge and its Application", the study of ammonia synthesis at high pressure by means of non-equilibrium plasma chemistry is carried out with a ultra-strong electric field ,which is formed in the narrow discharging gap with reduced electronic field intensity E/n 300Td, average electron energy 8eV and electron density 1015/cm3, at the same time hypothesis of synthesis new substance in atom, atom group or molecular scale is realized. It expands the reactive condition of plasma chemistry from low pressure to high pressure(> O.lMPa), widens the study and application region of plasma chemistry, and provides theory and technology to its applications in chemical industry, environmental engineering and material industry.Process of ionization and decomposition of N2 and HI and synthesis of ammonia is studied, and reactive system at high pressure is established. Phenomenon of microdischarge is observed through transparent electrode, characterization and comparison of different microdischarge at different reduced electric fields is made to study the forming principle of dielectric barrier discharge. Orientation chemical reaction occurred by controlling the reduced electric field, gas temperature, gas volume and H2/N2 volume ratio, the concentration of ammonia reaches up to 12500ppm, which is equal to 4500 times that of Qingshan University's at low pressure in Japan.