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DEVELOPMENT OF ATMOSPHERE ENVIRONMENTAL PROTECTION TECHNOLOGY BY USING ATMOSPHERIC PRESSURE NON-THERMAL PLASMA PROCESS

常压非热等离子工艺大气环保技术的开发

基本信息

批准号：
16206026
负责人：
ODA Tetsuji
金额：
$ 31.87万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

The aim of this project is the development of high pressure non-thermal plasma process to decompose gaseous environmental toxic contaminants and is scheduled for four years research. The target is establishment of non-thermal plasma process to decompose volatile organic compounds (VOCs) and realization of the diagnosis technology for the non-thermal plasma process, especially the researches concentrate to develop various optical technology, such as laser-induced fluorescence (LIF) technology for OH, O, NO, N_2*. For VOCs decomposition, 100-1,000 ppm trichloroethylene in air; is investigated as the decomposing target. To improve the decomposition energy efficiency, various kinds of catalysts are combined to the plasma process. It was f u d that the manganese-dioxide works very well to decompose the ozone which is the main byproducts for the plasma process of the air. Especially manganese-dioxide supported alumna, spheres decomposes the ozone very well and decomposes TCE very well. Only for decomposing the VOCs, specific energy density (SED) of 10 J/L can decompose TCS more than 90 %but the carbon balance to carbon oxide is very bad. It is found that SED of more than 90 J/L is required to realize the carbon balance to carbon oxide of 90 %. Two dimensional trace of the OH radical profile after the pulse discharge is recorded by using LIPF (laser-induced predissociation fluorescence) where most OH is produced in the streamer. A life time of OH is about 100 microseconds. Atomic oxygen radical is also observed by TALIF (two-photon assisted LIF) results are in good agreement with the ozone profile indicating the ozone generation by the 0 radical effect Recently, streamer motion and N2 radical is also observed by LIE Optical emission spectroscopy and Schlieren photos are also experimentally observed Still there are so many miscellaneous matters and improvement of the energy efficiency are also next good target.

该项目的目标是开发高压非热等离子体工艺来分解气态环境有毒污染物，并计划进行四年的研究。目标是建立非热等离子体分解挥发性有机化合物（VOCs）的工艺，实现非热等离子体过程的诊断技术，特别是研究开发各种光学技术，如OH、O、NO、N_2*的激光诱导荧光（LIF）技术。对于VOCs分解，空气中100-1,000 ppm三氯乙烯；作为分解目标进行研究。为了提高分解能量效率，等离子体过程中结合了各种催化剂。事实证明，二氧化锰能够很好地分解臭氧，而臭氧是空气等离子过程的主要副产品。特别是二氧化锰负载的氧化铝球可以很好地分解臭氧，并且可以很好地分解TCE。仅分解VOCs，比能量密度(SED)为10 J/L即可分解90%以上的TCS，但对碳氧化物的碳平衡很差。研究发现，要实现90%的碳平衡，需要大于90 J/L的SED。使用 LIPF（激光诱导预解离荧光）记录脉冲放电后 OH 自由基轮廓的二维轨迹，其中大多数 OH 是在流光中产生的。 OH的寿命约为100微秒。 TALIF（双光子辅助LIF）也观察到原子氧自由基，结果与臭氧剖面非常吻合，表明0自由基效应产生臭氧。最近，LIE也观察到流注运动和N2自由基。光学发射光谱和纹影照片也实验观察到，但还有很多杂项，提高能源效率也是下一个好的目标。