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

在不久的将来开发了一种用于超级清洁柴油发动机的新型等离子体排气清洁系统，并对其进行了基础研究。这项研究的特征是利用低温非热和非平衡等离子体。 “ 1。非平衡等离子体DPF（柴油特异性滤波器）再生”和“ 2。进行NOX的非平衡等离子体解吸和减少”的研究与开发。获得以下结果1。非平衡等离子体DPF再生：证明了被DPF捕获的柴油颗粒的新切口再生系统，并使用大气压力的非热等离子体优化了性能。在此系统中，将NO_2，臭氧和负离子自由基簇与非热等离子体激发的DPF引入，以实现几乎在室温下的柴油颗粒物。使用小型柴油发动机，在发动机操作期间继续再生几乎以20…更多0℃的排气性进行。能耗进一步降低至1 WH/m^3.2. NOX的nonequilibrium血浆解吸和减少：在柴油发动机的废气中，通常包含大约2至10 vol。的氧气。将等离子体应用于这种废气，总NOx（= no + no_2）的数量几乎不会减少，因为排气中的大部分不含的大部分仅被氧化为NO_2，因此该过程不被认为是一个真实的污染控制过程。因此，提出了以下新过程：在富氧状态下，含有NOX的废气首先吸附到反应器中的吸附剂上。 NOX添加吸附达到饱和度后，通过更改发动机操作模式获得的N_2气体或包含大量HC，CO和更少的O_2的排气气，并以较小的流速将其引入反应器中，并应用等离子体。结果，简单地进行了NOX的解吸和减少，HC和CO的氧化是简单的。在实验室测试中，实现了250 ppm的22Wh/m^3的能源效率，超过85％的能源效率。此外，对处理小型柴油发动机（200cc）的整个废气的本系统进行检查。确认了系统的操作程序和有效性。3。进行非平衡等离子体化学的数值模拟，并阐明了血浆排气气体加工的详细机制（化学反应）。较少的

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：
S.KOIDE et al.;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

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