Abstract
Non-thermal plasma processes at atmospheric pressure have been considered to be an effective method for NOx removal. In this study, a packed-bed reactor for NOx removal from air steam was developed using the BaTiO3 pellets prepared by ourselves. The reactor consists of the glass tube with the inner diameter of 17.5mm and two mesh electrodes. BaTiO3 pellets were packed between two mesh electrodes in the glass tube. In order to investigate effects of the sintering temperature of BaTiO3 pellets used in the reactor on NOx removal, we prepared BaTiO3 pellets sintered at the temperatures in the range from 100°C to 1300°C. As a result, maximum NOx (=NO+NO2) removal rate was 85% using the BaTiO3 pellets sintered at 600°C.In this case N2O of about 10ppm was generated for the voltage at which maximum NOx removal rate was obtained and O3 was not detected. On the other hand, using the BaTiO3 pellets sintered at the temperatures over 1000°C, concentrations of NO and NO2 were increased with increasing the applied voltage compared to their initial concentrations. Properties of BaTiO3 pellets, which significantly affect NOx removal characteristics, depend on the sintering temperatures.
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