Pulse Intense Electron Beam Irradiation on the Atmospheric Pressure N2 Containing 200 ppm of NO
Pulse Intense Electron Beam Irradiation on the Atmospheric Pressure N2 Containing 200 ppm of NO
复制标题
对含有 200 ppm NO 的大气压 N2 进行脉冲强电子束照射
DOI：
10.1143/jjap.37.5082
复制
发表时间：
1998
影响因子：
1.5
通讯作者：
H. Kawauchi
中科院分区：
文献类型：
--
作者：
Y. Nakagawa;H. Kawauchi
研究了脉冲强电子束辐照去除N2中的氮氧化物（NOx）。将脉冲电子束（动能；≤160 keV，电流；~ 140 A，电流密度；~ 2 A/cm2，脉冲宽度；~ 700 ns，一次脉冲的电子束能量；12.6±0.4 J）注入充满1个大气压N2的气池中，初始浓度为200 ppm的NO。通过电子束辐照，NOx迅速减少，仅产生少量NO2。氮气发生电子冲击解离，随后氮自由基对NO进行化学还原。在1.7 l的气池中，第一次喷射的典型去除率约为20%，连续8次喷射后去除率可达95%。该去除率对应的去除率为220 ~ 300 nmol/J。考察了气槽长度、充注压力、NO初始浓度、单脉冲电子束能量和轴向磁场对NOx去除率和效率的影响。
Removal of nitrogen oxides (NOx) in N2 by the pulse intense electron beam irradiation was investigated. The pulse electron beam (kinetic energy; ≤160 keV, current; ∼140 A, current density; ∼2 A/cm2, pulse width; ∼700 ns and the electron beam energy in one pulse; 12.6±0.4 J) was injected into a gas cell filled with 1 atmospheric pressure N2 with an initial concentration of 200 ppm of NO. The NOx decreased quickly and only a small amount of NO2 was produced by the electron beam irradiation. Electron impact dissociation of N2 and the subsequent chemical reduction of NO by nitrogen radicals was occurred. The typical removal ratio in the gas cell of 1.7 l was about 20% for the first shot and reached to 95% after 8 successive shots. This removal ratio corresponds to the removal efficiency of 220–300 nmol/J. The NOx removal ratio and the efficiency which depended on the length of the gas cell, the filling pressure, the initial concentration of NO, the electron beam energy in one pulse and the axial magnetic field were investigated.