Total diesel emission control system using ozone injection and plasma desorption
Total diesel emission control system using ozone injection and plasma desorption
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DOI：
10.1109/ias.2005.1518875
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发表时间：
2005-10
期刊：
影响因子：
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通讯作者：
M. Okubo;N. Arita;T. Kuroki;T. Yamamoto
中科院分区：
文献类型：
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作者：
M. Okubo;N. Arita;T. Kuroki;T. Yamamoto
作者报道了一种结合非热等离子体和柴油颗粒过滤器（DPF）的新型柴油 soot（烟灰）焚烧技术，以及一种利用非热等离子体解吸和还原处理燃烧系统废气中氮氧化物（NOₓ）的新型后处理技术。我们提出的柴油排放综合控制系统包含这两项新技术。在该系统中，等离子体反应器位于排放排气管外部，由等离子体激活臭氧产生的自由基气体被注入排气管。这被称为作者首次提出的用于净化柴油微粒和NOₓ的间接或远程非热等离子体方法。本研究证实，使用间接富氧远程表面放电等离子体可以实现微粒去除或DPF连续再生。另一方面，利用贫氧非热等离子体解吸可实现NOₓ的还原。可以通过控制发动机的燃烧状态或注入贫氧气体来改变氧气浓度。针对小型柴油发电机的排放进行了实验，并展示了高性能。由于等离子体的周期性或间歇性应用，使用该系统可以进一步降低有效或表观所需的等离子体能量。在本研究中，实现了颗粒物（PM）为6.6克/千瓦时和NOₓ为10克（NO）/千瓦时的还原能量效率。这些是满足日本近期针对柴油汽车的新长期国家法规的可实现的电力值。
The authors reported a new diesel soot incineration technology using a combination of nonthermal plasma and DPF, and a new aftertreatment technology of NO/sub x/ included in exhaust gas of combustion system using nonthermal plasma desorption and reduction. Our proposed total diesel emission control system includes these new two technologies. In this system, the plasma reactor is located outside the emission exhaust pipe and radical gas induced from ozone activated by the plasma is injected into the exhaust pipe. This is called indirect or remote nonthermal plasma method first proposed by the authors for cleanup of diesel panrticulate and NO/sub x/. It is confirmed in this study that the particulate removal or DPF continuous regeneration is possible using the indirect oxygen-rich remote surface discharge plasma. On the other hand, the NO/sub x/ reduction is achieved using oxygen-poor nonthermal plasma desorption. The concentration of oxygen can be changed either by controlling the incineration state of the engine or by injecting oxygen-poor gas. Experiments are carried out for the emission of small diesel engine generator and high performance is demonstrated. The effective or apparent required plasma energy can be decreased further using this system because of the periodic or intermittent application of the plasma. In the present study, the reduction energy efficiencies of 6.6 g/kWh for PM and 10 g (NO)/kWh for NO/sub x/ are achieved. These are realizable electric power values to meet the recent Japanese new long-term national regulation for diesel automobiles.