Removal of NO/sub x/ from diesel generator exhaust by pulsed electron beams
Removal of NO/sub x/ from diesel generator exhaust by pulsed electron beams
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脉冲电子束去除柴油发电机尾气中的 NO/sub x/
DOI：
10.1109/ppc.1997.679282
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
B. Penetrante
中科院分区：
文献类型：
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作者：
B. Penetrante
本文的目的是确定电子束脉冲参数对利用反应性自由基脱除柴油发电机排气中的NO/subx/的影响。对于有效地利用自由基团，每个脉冲的剂量小于1kGy已被确定为最佳。在每个脉冲后期间，自由基被用来在大约100微秒的时间尺度内去除NO/subx/；因此，在脉冲频率约为10 kHz或更低的情况下，自由基浓度保持在足够低的水平，以防止自由基污染物反应和自由基-自由基反应之间的任何重大竞争。结果表明，脉冲电子束反应堆在每脉冲剂量小于1kGy·脉冲、脉冲重复频率小于10 kHz时，其等离子体化学效率(脱除NO的百万分之一/次x/每kGy电子束剂量)与低剂量率50kGy·S在连续模式下的等离子体化学效率相同。在高脉冲频率条件下，臭氧积累是一个限制因素。总剂量要求决定了每脉冲剂量和脉冲频率的最佳组合，既可用于根基利用，也可用于防止臭氧积聚。
The objective of this paper is to determine the effects of electron beam pulse parameters on the utilization of the reactive free radicals for removal of NO/sub x/ from diesel generator exhaust. A dose per pulse less than 1 kGy has been determined to be optimum for effective radical utilization. During each post-pulse period, the radicals are utilized in the removal of NO/sub x/ in a timescale of around 100 microseconds; thus, with pulse frequencies of around 10 kHz or less, the radical concentrations remain sufficiently low to prevent any significant competition between radical-pollutant and radical-radical reactions. It is shown that a pulsed electron beam reactor, operating with a dose per pulse of less than 1 kGy/pulse and pulse repetition rate of less than 10 kHz, will have the same plasma chemistry efficiency (parts per million of removed NO/sub x/ per kGy of electron beam dose) as an electron beam reactor operating with a low dose rate of 50 kGy/s in continuous mode. Ozone accumulation is a limiting factor under high pulse frequency conditions. The total dose requirement determines the optimum combination of dose per pulse and pulse frequency for both radical utilization and prevention of ozone buildup.