Purification of particulate materials exhausted by diesel engine using high concentration and efficient ozonizer

高浓度高效臭氧发生器净化柴油机排出的颗粒物

• 批准号: 14550267
• 负责人: YAMAGATA Yukihiko
• 金额: $ 2.37万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550267/
• 关键词: Dielectric barrier discharge; Ozone; Diesel exhaust gas; Nitric oxides; Diesel particulate matters; Environmentally hazardous materials; Densification; Honeycomb structure; NOX

A new decomposition method for diesel particulate materials (DPM) using efficient and high-concentration ozone generation technology has been investigated. After sufficient densification/localization of the DPM and nitric oxides ~with low concentration in diesel exhaust gas using a filter etc., these environmentally hazardous materials are exposed and decomposed by dielectric barrier discharge (DBD).First, localization to the filter surface (penetration diameter 2μm) of DPM in diesel engine exhaust gas was tried. The collection of the DPM was carried out to the filter, and the concentration after the filter was made to below the minimum detection limit of a smoke meter. Observations of the increase of CO and CO_2 and the decrease of NO_x in processed gas suggest that the possibility of the concurrent processing of DPM and NOx in exhaust gas. However, in application to the diesel engine system, it became clear that the pressure loss by filter insertion poses a problem.In order to solve this, the new collecting system of which involves an electrostatic precipitator for DPM and a honeycomb sheet containing PZA (Pt-Zr_2-Al_2O3) catalyst in the same DBD space was developed. Thereby, 65 % of DPM particle (average of 0.3μm) were caught at applied voltage of DC 2kV and gas flow rate of 81/min., and it was shown that electrostatic precipitation is effective to collect sub-micron DPM. Moreover, DBDs operated from commercial frequency to 10 kHz were generated uniformly by the same electrode arrangement, and the temperature rise of 300℃ has also been attained. Since adsorption/desorption of NOx in PZA honeycomb was realizable with temperature control, the validity of this system became clear.

研究了一种利用高效高浓度臭氧发生技术分解柴油颗粒物质（DPM）的新方法。使用过滤器等对柴油机废气中低浓度的DPM和一氧化氮进行充分致密化/局部化后，这些对环境有害的物质通过介质阻挡放电（DBD）暴露并分解。首先，尝试将柴油机废气中的DPM局部化到过滤器表面（穿透直径2μm）。通过过滤器进行DPM的捕集，使过滤器后的浓度低于烟度计的最低检测限。对处理气体中CO和CO_2的增加以及NO_x的减少的观察表明，同时处理废气中的DPM和NOx的可能性。然而，在应用于柴油发动机系统时，我们发现过滤器插入造成的压力损失是一个问题。为了解决这个问题，开发了一种新的收集系统，该系统包括用于 DPM 的静电除尘器和在同一 DBD 空间中包含 PZA (Pt-Zr_2-Al_2O3) 催化剂的蜂窝板。由此，在施加电压为DC 2kV、气体流量为81/分钟的情况下，捕获了65%的DPM颗粒（平均0.3μm），这表明静电沉淀对于收集亚微米DPM是有效的。此外，通过相同的电极布置均匀地产生从商业频率到10kHz的DBD，并且还实现了300℃的温升。由于PZA蜂窝中NOx的吸附/解吸可以通过温度控制实现，因此该系统的有效性变得清晰。

项目成果

Y.Yamagata, T.Matsui, T.Ebihara, K.Muraoka: "Decomposition of Diesel Particulate Materials and Nitric Oxides Using a Dielectric Barrier Discharge"Proceedings of the Electrostatics Conference 2003 (Heriot-Watt University, Edinburgh, U.K.). (in press). 23-2

Y.Yamagata、T.Matsui、T.Ebihara、K.Muraoka：“利用介质阻挡放电分解柴油颗粒材料和一氧化氮”2003 年静电会议论文集（赫瑞瓦特大学，爱丁堡，英国）。

T.Ebihara S.Kuba, K.Misumi, Y.Yamagata, K.Muraoka: "Development of diesel exhaust aftertreatments by combinations of barrier discharge with densification"Proceedings of 7^<th> Annual Meeting of The Kyushu-Okinawa-Yamaguchi Branch of The Japan Society of P

T.Ebihara S.Kuba、K.Misumi、Y.Yamagata、K.Muraoka：“通过屏障放电与致密化相结合的柴油机废气后处理技术的开发”九州冲绳山口分会第 7 届年会会议记录

蛯原隆, 久芳史朗, 三角 和宏, 山形幸彦, 村岡克紀: "濃縮過程とバリア放電を組み合わせたディーゼル排ガス後処理法の開発"プラズマ核融合学会九州・沖縄・山口支部第7回支部大会研究発表論文集(熊本大学,平15年12月). 71-72 (2003)

Takashi Ebihara、Shiro Hisayoshi、Kazuhiro Misumi、Yukihiko Yamagata、Katsunori Muraoka：“开发结合浓缩过程和阻挡放电的柴油机废气后处理方法”在九州、冲绳和山口分会第七届分会会议上的研究报告论文等离子融合协会合集（熊本大学，2003 年 12 月）71-72 (2003)。

Y.Yamagata, T.Matsui, T.Ebihara, K.Muraoka: "Decomposition of Diesel Particulate Materials and Nitric Oxides Using a Dielectric Barrier Discharge"Proceeding of the Electrostatics Conference 2003 (Heriot-Watt University, Edinburgh, U.K.,23-27 March 2003).

Y.Yamagata、T.Matsui、T.Ebihara、K.Muraoka：“利用介质阻挡放电分解柴油颗粒材料和一氧化氮”2003 年静电会议论文集（英国爱丁堡赫瑞瓦特大学，23-27

Y.Yamagata, T.Matsui, T.Ebihara, K.Muraoka: "Decomposition of Diesel Particulate Materials and Nitric Oxides Using a Dielectric Barrier Discharge"Proceedings of the Electrostatics Conference 2003(Heriot-Watt University.Edinburgh.U.K.,23-27 March 2003). 印刷

Y.Yamagata、T.Matsui、T.Ebihara、K.Muraoka：“利用介质阻挡放电分解柴油颗粒材料和一氧化氮”2003 年静电会议论文集（赫瑞瓦特大学.爱丁堡.英国,23-27 2003 年 3 月).打印