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Development of High Efficiency Gas Treatment System by Pulsed Electron Beam Irradiation

脉冲电子束辐照高效气体处理系统的研制

基本信息

批准号：
17360122
负责人：
WATANABE Masato
金额：
$ 9.02万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360122/
关键词：
Electron beam Volatile organic compound Pulse power Plasma Wire discharge

项目摘要

The purpose of this research project is to develop an effective gaseous treatment system in order to reduce the emission of gaseous compounds including Volatile Organic Compounds (VOCs).A low-energy secondary emission electron gun (SEEG) using wire ion plasma source (WIPS) was applied to generate electron beams. The characteristics of ion beam and secondary electron beam were investigated in order to achieve main objective, which is to increase removal efficiency of VOCs using SEEG. The results of ion beam current measurement showed that there were some limitations at electron accelerating chamber, so the pressure at WIPS can be optimized for 20 mTorr. Distribution of electron beam energy at gas treatment chamber was measured using photosensitive film and it was observed that electron beam filtered in through the electron window at 63 kV and there expected to be small energy losses at the accelerating voltage of 100 kV. At 100 kV, the electron beam reaches the distance as high as 80 mm from electron window and performs enough energy distribution at the dimension of (27x373x60) mm3.Decomposition of benzene and trichloroethylene were studied at the accelerating voltage of 100 kV, the gas volume of 6 L. The degrees of decomposition at the shot number of 1000 were observed as 60 % for benzene and 70 % for trichloroethylene, respectively. The results show that 90 % decomposition of benzene at a flow rate of 3 L/s can be achieved at pulse repetition rate of 2 kHz and SEEG is a promising device for treating VOCs at a small-scale industrial corporation or a smoking area.

本研究的目的是开发一种有效的气体处理系统，以减少气体化合物，包括挥发性有机化合物（VOCs）的排放。为了提高SEEG去除VOCs的效率，研究了离子束和二次电子束的特性。离子束流测量结果表明，电子加速室存在一定的局限性，因此WIPS的气压可优化为20 mTorr。使用光敏膜测量气体处理室中的电子束能量分布，并且观察到电子束在63 kV下通过电子窗过滤，并且预期在100 kV的加速电压下有小的能量损失。在100 kV下，电子束到达离电子窗80 mm的距离，在（27 × 373 × 60）mm 3的尺度上进行了足够的能量分布。在加速电压为100 kV，气体体积为6 L的条件下，研究了苯和三氯乙烯的分解。在注射次数为1000时，观察到苯和三氯乙烯的分解度分别为60%和70%。结果表明，在脉冲重复频率为2 kHz，流量为3 L/s时，苯的降解率可达90%，SEEG是一种很有前途的处理小型工业企业或吸烟区VOCs的装置。