Majorization of working parameters for non-thermal plasma reactor and impact on no oxidation of diesel engine
Majorization of working parameters for non-thermal plasma reactor and impact on no oxidation of diesel engine
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DOI：
10.1007/s12239-017-0022-8
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发表时间：
2017-01
影响因子：
1.6
通讯作者：
J. Wang;T. He;C. Li
中科院分区：
文献类型：
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作者：
J. Wang;T. He;C. Li
本工作的主要目标是利用自行设计的双介质非热等离子体（NTP）反应器实现预氧化柴油机排气中NO的功能。通过空气放电试验获得了NTP反应器的主要放电频率和放电峰峰值电压(Vp-p)范围。建立柴油机试验台，观察NTP对NO体积分数的影响。结果表明，当放电频率为9 kHz、Vp-p在9 kV～23 kV之间时，NTP反应器活性物质较多，副产物较少；废气流量对NTP预氧化NO性能影响不显着；随着发动机负荷的增加，NTP预氧化NO的能力逐渐减弱，当发动机负荷为0%和25%时，NO/NO2的比值可达到1。在这种工况下，SCR系统通过与NTP的快速反应，可以提高NOxat低温区的转化率。
The main target of this work is to realize the function of pre-oxidizing NO from diesel engine’s exhaust by using self-designed double-dielectric Non-thermal Plasma (NTP) reactor. The majorized discharge frequency and discharge peak to peak voltage (Vp-p) range for NTP reactor were obtained through air discharge test. The diesel engine test bench was established to observe the effect of NTP on the volume fraction of NO. The results showed that there were more active substances and fewer by-products in NTP reactor when discharge frequency was 9 kHz and Vp-pwas between 9 kV and 23 kV; Exhaust flows had insignificant effect on the performance of NTP pre-oxidizing NO; The ability of NTP to pre-oxidize NO gradually weakened with the increase of engine load, and when the engine load were 0 % and 25 %, the ratio of NO/NO2could reach 1. In such working conditions, SCR system could improve the conversion rate of the NOxat low-temperature zone through quick reaction combined with NTP.