Characteristics of NO/sub x/ treatment by secondary emission electron gun

Abstract

Summary form only given. Emission of pollutant gases, such as NO/sub x/ and SO/sub x/, from thermoelectric power plant, diesel engines and so on is a serious environmental problem. It is well known that the nonthermal plasma processes using electrical discharge or electron beam are effective for the pollutant removal. Especially, the electron beam can efficiently remove pollutant, because a lot of radicals which are useful to remove pollutant can be easily produced by high energy electrons. In this study, a side-extraction-type secondary electron gun using wire ion plasma source was applied to NO/sub x/ treatment and the characteristics of NO/sub x/ removal were investigated. A schematic diagram of the experimental setup is shown. The experimental device is composed of three parts: wire ion plasma source, an electron gun and a gas treatment chamber. In previous experiments, it was observed that the uniform electron beam inside the gas treatment chamber has sufficient energy to irradiate gaseous pollutants such as NO/sub x/. In present experiments, the influences of electron beam energy, shot numbers and initial concentration of NO., will be discussed.