Transport and Focus of Pulse Intense Electron Beam and its Application for Decomposition of Environmental Pollution Gas

Fundamental research for developing a new dry process of flue gas treatment device by the pulseintense electron beam was performed. Basic data on the NO D2x D2 removal from pure nitrogen oroxygen mixed nitrogen gas (model flue gas) were experimentally obtained by using theD2x D2- o D22 - D2 measuring device (no -7000) that was bought by the Grant-in-Aid in 1997. Aftergeneration of N radicals in pure nitrogen by the injection of pulse high current electron beam（【少than or equal】160kev， 140a, 2a /cm - D12 - D1, 700ns, 12.6 J/shot），NO was reduced to N - D22 - D2 and O - 22 - D2. The energy efficiency of NO - D2x - D2 removal was equalto that for the continuous electron beam or 2 - 3 times larger value (500 - 900 nmol/J) than that atoptimized conditions of the gas cell volumeinitial NO concentration and electron beam power. In the model flue gasOH radicals removed NO D2x D2 at the efficiency of 400 nmol/J when the water was added to themixture gas. NO - D2x - D2 was also removed at higher efficiency when the inner wall of the gas cellwas covered with the wet cloth. By addition of NH D23 D2 only，NO D2x D2 was almoved . New high current density electron beam reactor was considered in whichthe electron beam was compressed and transported by self magnetic field generated by its largecurrent. As a scheme，the pulse electron beam was compressed and transported by strong external magnetic field andinjected into NO(=200 ppm)/N - D22 - D2 gas. NO - D2x - D2 was removed as high as 50% by 3 shots. These结果suggest that pulse intense electron beam has a possibility to bea new gas treatmentdevice。

Fundamental research for developing a new dry process of flue gas treatment device by the pulse intense electron beam was performed. Basic data on the NOィイD2xィエD2 removal from pure nitrogen or oxygen mixed nitrogen gas (model flue gas) were experimentally obtained by using the NィイD2xィエD2-OィイD22ィエD2 measuring device (NOA-7000) that was bought by the Grant-in-Aid in 1997. After generation of N radicals in pure nitrogen by the injection of pulse high current electron beam (【less than or equal】160keV, 140A, 2A/cmィイD12ィエD1, 700ns, 12.6 J/shot), NO was reduced to NィイD22ィエD2 and OィイD22ィエD2. The energy efficiency of NOィイD2xィエD2 removal was equal to that for the continuous electron beam or 2 〜 3 times larger value (500 〜 900 nmol/J) than that at optimized conditions of the gas cell volume, initial NO concentration and electron beam power. In the model flue gas, OH radicals removed NOィイD2xィエD2 at the efficiency of 400 nmol/J when the water was added to the mixture gas. NOィイD2xィエD2 was also removed at higher efficiency when the inner wall of the gas cell was covered with the wet cloth. By addition of NHィイD23ィエD2 only, NOィイD2xィエD2 was also removed. New high current density electron beam reactor was considered in which the electron beam was compressed and transported by self magnetic field generated by its large current. As a preliminary experiment of such a scheme, the pulse electron beam was compressed and transported by strong external magnetic field and injected into NO(=200 ppm)/NィイD22ィエD2 gas. NOィイD2xィエD2 was removed as high as 50% by 3 shots. These results suggest that the pulse intense electron beam has a possibility to be a new gas treatment device.