Exhaust gas treatment from diesel engine using ceramic filter-a development of simultaneous treatment technique of particulate material and gas pollutant by SPCP-

陶瓷过滤器处理柴油机废气-SPCP颗粒物与气体污染物同时处理技术的发展-

• 批准号: 09555232
• 负责人: YAMAMOTO Hideo
• 金额: $ 3.71万
• 依托单位: SOKA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555232/
• 关键词: exhaust gas treatment from diesel engine; discharge treatment; oxidation of soot; reduction of nitrogen oxide; trichloroethylene; ceramic filter; ディーゼルエンジンの排ガス; セラミックフィルター; 媒粒子の酸化; トリクレンの分解; 煤粒子の酸化; 非対称膜

SPCP (Surface corona discharge induced Plasma Chemical Process) is a method which can activate many kinds of chemical reaction due to radicals in a so-called surface discharge. In this study, a special and novel reactor design was established. This is a hybrid of the SPCP and a ceramic filter, and on the surface of the ceramic filter a surface discharge can be generated. By using this system, gas treatment was tested. As a sample, imperfect combustion gas from butane including particulate material (soot) and standard sample of nitrate oxide, which were model gases of exhaust gas from diesel engine, were applied. The soot in the sample gas was completely filtered by the ceramic filter. Also, when SPCP was applied on the precipitated soot, it was oxidized and removed in the surface discharge on the ceramic filter. It was confirmed that the hybrid system constructed here performed successfully for the soot filtration and removal. On the other hand, nitrogen oxide was also reduced and removed in the surface discharge corona. In these reactions, one is a oxidation and the other is a reduction. When these loads are applied simultaneously, it was confirmed that the reactions progressed simultaneously, ant it was suggested the process is complementary. Besides, the system was applied also for a treatment of trichioroethylene. It was confirmed that trichloroethylene was removed successfully. In this system, treated gas passes through the ceramic filter and the plasma region which is generated on the surface of the filter, therefore a contact efficiency between the treated gas and discharge corona and this results in a good efficiency of the reaction activated.

表面电晕放电诱导等离子体化学过程(SPCP)是一种在所谓的表面放电过程中，由于自由基引起的多种化学反应被激活的方法。在这项研究中，建立了一种特殊而新颖的反应器设计。这是SPCP和陶瓷过滤器的混合体，在陶瓷过滤器的表面可以产生表面放电。利用该系统进行了气体处理试验。以柴油机排气模型气中含有颗粒物(碳烟)的丁烷不完全燃烧气体和硝酸盐标准样品为样本。样品气中的烟尘被陶瓷过滤器完全过滤掉。此外，当SPCP被施加到沉淀的碳烟上时，它在陶瓷过滤器的表面放电中被氧化和去除。结果表明，所构建的复合系统具有较好的滤烟和除尘效果。另一方面，氮氧化物在表面放电电晕中也被还原和去除。在这些反应中，一个是氧化反应，另一个是还原反应。当同时施加这些载荷时，证实了反应是同时进行的，并表明该过程是互补的。此外，该系统还用于三氯乙烯的处理。经验证，三氯乙烯已成功脱除。在该系统中，处理后的气体通过陶瓷过滤器和过滤器表面产生的等离子体区域，从而提高了处理气体与放电电晕之间的接触效率，从而导致了良好的反应被激活的效率。