Single-Stage Simultaneous Reduction of Diesel Particulate and $\hbox{NO}_{\rm x}$ Using Oxygen-Lean Nonthermal Plasma Application
Single-Stage Simultaneous Reduction of Diesel Particulate and $\hbox{NO}_{\rm x}$ Using Oxygen-Lean Nonthermal Plasma Application
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DOI：
10.1109/tia.2010.2071070
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发表时间：
2010-09
影响因子：
4.4
通讯作者：
M. Okubo;T. Kuroki;Keiichiro Yoshida;Toshiaki Yamamoto
中科院分区：
文献类型：
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作者：
M. Okubo;T. Kuroki;Keiichiro Yoshida;Toshiaki Yamamoto
采用脉冲高压电源驱动的阻挡型填充床低温等离子体（NTP），在贫氧条件下实现了柴油机颗粒物（PM）和NOx的同时减排。使用具有大介电常数（~ 10 000）的BaTiO 3颗粒作为填充颗粒，并且在颗粒之间加载碳PM。氮氧化物被还原的N自由基，和PM被焚烧的氧自由基诱导的NOx或臭氧（O3）的还原在升高的局部温度之间的颗粒。从颗粒的照片可以确认，在贫氧条件下除去了碳PM或烟灰，导致PM和NOx的同时除去。存在最佳的负载PM质量值，并且当负载PM质量大于阈值时，由局部放电引起的NTP的效果太弱而不能同时还原PM和NOx。在优化的等离子体条件下，实验产生的能量效率为2.2克/千瓦时的PM焚烧和4.3克（NO2）/千瓦时的实验中的NOx还原。
A simultaneous reduction of particulate matter (PM) and NOx emitted from diesel engines has been realized by means of a barrier-type packed-bed nonthermal plasma (NTP) application driven by a pulse high-voltage power supply under oxygen-lean conditions. BaTiO3 particles having a large dielectric constant ( ~ 10 000) are used as packed pellets, and carbon PM is loaded among the pellets. NOx is reduced by N radicals, and PM is incinerated by oxygen radicals induced either by NOx or by ozone (O3) reduction under elevated local temperatures among the pellets. From the photographs of the pellets, it can be confirmed that the carbon PM or soot is removed under the condition of lean oxygen, resulting in the simultaneous removal of the PM and NOx. An optimal value for the mass of the loaded PM exists, and when the loaded PM mass is greater than a threshold value, the effect of the NTP induced by the partial discharge is too weak to simultaneously reduce the PM and NOx. Under the optimized plasma condition, the experiment yields energy efficiencies of 2.2 g/kWh for the PM incineration and 4.3 g(NO2)/kWh for the NOx reduction in the experiment.