Abstract
Fundamental research on removal of NOx from the mixture gas by irradiation using the pulsed intense electron beam, which have energy of /spl les/160 keV, beam current of 140 A, current density of 2 A/cm/sup 2/, pulse width of 700 ns and electron beam power of 12.6/spl plusmn/0.4 J/pulse at standard conditions, was performed. When NO(=200 ppm)/N/sub 2/ was processed, NO was decomposed to N/sub 2/ and O/sub 2/ with the efficiency for the beam power of 220-300 nmol/J. Oxidization of NO to NO/sub 2/ was accelerated by the beam irradiation in the gas mixture of NO(=160 ppm)/O/sub 2/(20%)/N/sub 2/(80%). By introducing equal amount of NH/sub 3/ or CH/sub 4/ to NO into this gas mixture, NOx decreased at 8th shot of beam irradiation when NO was completely converted to NO/sub 2/. NOx removal from NO(=200 ppm)/N/sub 2/ gas in various gas cell and NO(=2000 ppm)/N/sub 2/ gas were investigated. The removal ratio in single shot was largest(30%) at the high current electron beam transported and compressed by external magnetic field but the removal efficiency was largest (650-860 nmol/J) at large volume gas cell without magnetic field. The efficiency increased to 1100 nmol/J for high NO concentration gas treatment.
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