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Innovative Emission Aftertreatment System for Super Clean Diesel Engine Using Nonequilibrium Plasma Process

采用非平衡等离子体工艺的超清洁柴油机创新排放后处理系统

基本信息

批准号：
16510065
负责人：
OKUBO Masaaki
金额：
$ 2.5万
依托单位：
Osaka Prefecture University, Graduate School of Engineering
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16510065/
关键词：
Diesel engine Exhaust gas NOx Particulate matter Plasma desorption DPF Adsorption Aftertreatment

项目摘要

A new type plasma exhaust cleanup system for super clean diesel engine in near future is developed and basic study on it is carried out. This research is characterized by utilizing low-temperature nonthermal and nonequilibrium plasma. Research and development of "1. Nonequilibrium plasma DPF (Diesel particulate filter) regeneration" and "2. Nonequilibrium plasma desorption and reduction of NOx" are made. The following results are obtained.1.Nonequilibrium plasma DPF regeneration : A new incineration regeneration system of the diesel particulates trapped by the DPF is demonstrated and the performance is optimized using the atmospheric-pressure nonthermal plasma. In this system, NO_2, ozone and negative ion radical clusters excited with the nonthermal plasma are introduced into the DPF to realize the removal of the diesel particulate nearly at the room temperature. Using a small diesel engine, continues regeneration during the engine operation is performed nearly at the exhaust gas of 20 … More 0℃. Energy consumption is further decreased down to 1 Wh/m^3.2.Nonequilibrium plasma desorption and reduction of NOx : In the exhaust gas of diesel engines, the oxygen of approximately 2〜10vol.% is usually contained. Applying the plasma to such exhaust gas, the total NOx (= NO + NO_2) amount hardly decreases because most of NO contained in the exhaust gas is only oxidized to NO_2, This process is not considered to be a real pollution control process. Therefore, the following new process is proposed : In the oxygen rich state, the exhaust gas containing NOx is first adsorbed to the adsorbent in the reactor. After the NOx adsorption reaches saturation, either N_2 gas or the exhaust gas containing much HC, CO and less O_2 obtained by changing the engine operation mode is introduced into the reactor with the small flow rate, applying the plasma. As a result, the desorption and reduction of NOx, and oxidization of HC and CO are carried out simultaneously. More than 85% removal with the energy efficiency of 22Wh/m^3 for 250 ppm NOx is achieved in the laboratory test. Furthermore, the examination of the present system treating the whole exhaust gas of a small diesel engine (200cc) is carried out. The operation procedure and validity of the system are confirmed.3.The numerical simulation of nonequilibrium plasma chemistry is performed and the detailed mechanisms (chemical reactions) of the plasma exhaust gas processing are clarified. Less

开发了一种新型的超净柴油机等离子体排气净化系统，并对其进行了基础研究。本研究的特点是利用低温非热非平衡等离子体。研发“1。非平衡等离子体DPF（柴油机微粒过滤器）再生”和“2。进行了非平衡等离子体脱附和NOx还原的研究。1.非平衡等离子体DPF再生：提出了一种新的DPF捕集柴油机微粒的焚烧再生系统，并利用常压低温等离子体对该系统的性能进行了优化。该系统利用低温等离子体激发的NO_2、臭氧和负离子自由基团簇，在近室温下对柴油机微粒进行净化。使用小型柴油发动机，在发动机操作期间的连续再生几乎在20 ° C的排气温度下进行。 ...更多信息 0℃。能耗进一步降低到1 Wh/m^3.2.非平衡等离子体脱附还原NOx：柴油机尾气中约2 × 10 vol.%的氧通常是包含的。将等离子体应用于这样的废气，总NOx（= NO + NO_2）量几乎没有减少，因为废气中所含的大部分NO仅被氧化成NO_2。该过程不被认为是真实的污染控制过程。因此，提出了以下新工艺：在富氧状态下，含有NOx的废气首先被吸附到反应器中的吸附剂上。在NOx吸附达到饱和后，将N_2气体或通过改变发动机运行模式获得的含有较多HC、CO和较少O_2的废气以小流量引入反应器中，施加等离子体。结果，NOx的脱附和还原以及HC和CO的氧化同时进行。在实验室试验中，对于250 ppm的NOx，能量效率为22 Wh/m^3，去除率超过85%。此外，对本系统处理一台小型柴油机（200 cc）的全部废气进行了检验。对非平衡等离子体化学过程进行了数值模拟，阐明了等离子体处理废气的详细机理（化学反应）。少

项目成果

期刊论文数量（53）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Advanced Air and Noise Pollution Control, Handbook of Environmental Engineering, Vol.2 (We wrote the chapter 8 entitled Odor Pollution Control) (Edited by L.K.Wang, N.C.Pereira, and Y-T.Hung)

Advanced Air and Noise Pollution Control, Handbook of Environmental Engineering, Vol.2（我们写了第8章，标题为气味污染控制）（编辑：L.K.Wang、N.C.Pereira、Y-T.Hung）

DOI：
发表时间：
2004
期刊：
影响因子：
0
作者：
T.Yamamoto;M.Okubo et al.
通讯作者：
M.Okubo et al.

プラズマ・化学複合プロセスを用いたディーゼル微粒子,NOx, SOxの湿式同時処理技術

采用等离子体和化学工艺相结合的湿法同时处理柴油颗粒物、氮氧化物和硫氧化物的技术

DOI：
发表时间：
2004
期刊：
日本機械学会論文集(B編) 70・691
影响因子：
0
作者：
Sei;K.;Inoue;D.;Wada;K.;Mori;K.;Ike;M.;Kohno;T.;Fujita;M;藤島英勝
通讯作者：
藤島英勝

エアロゾル用語集

气溶胶术语表

DOI：
发表时间：
2004
期刊：
影响因子：
0
作者：
Yasuhiro Nishiyama;Masayuki Kaneda;Ryota Saito;Tadashi Mori;Takehiko Wada;Yoshihisa Inoue;W.Wang;W.Lenggoro;W.Lenggoro;D.Saucy;W.Lenggoro
通讯作者：
W.Lenggoro

間接プラズマ・化学複合プロセスを用いたNO_x処理技術(空気活性ガス注入方式と直接酸化方式の比較)

间接等离子体/化学联合工艺NO_x处理技术（空气活性气体喷射法与直接氧化法比较）