APPLICATION OF PULSE HIGH-ENERGY ELECTRON-BEAMS FOR DECOMPOSITION OF CHLOROFLUOROCARBON IN ATMOSPHERIC-PRESSURE AIR

It is experimentally shown that a pollutant (Freon) in at mospheric-pr essure air can be decomposed by irradiation of pulse high-energy elect ron beams. Pulse electron beams having 100 similar to 220 kV energy wi th about 500 ns pulse width and a current density of about 3 A/cm(2) w ere injected into air contaminated with Freon-12 of 300 similar to 480 0 ppm. Freon-12 in the gas cell was reduced by about 5% per pulse. Fre on might be decomposed to CO2, hydrides of Cl or F and intermediate la rge molecules through the chemical reaction between Freon, air and the mixed hydrogen or residual water vapor. The decomposition rate was al most constant even though the density of Freon was changed from 300 to 4800 ppm. The decomposition rate and the decomposed amount greatly in creased upon increasing the beam energy (150 to 220 keV) and current ( 310 to 780 A). The efficiency of decomposition for beam power increase d to 100 nmol/J upon increasing beam energy to 82 J per pulse.