Catalyst Size Impact on Non-Thermal Plasma Catalyst Assisted deNOx Reactors
Non-thermal plasma assisted catalytic reaction is an effective way to remove NOx from automobile exhaust. Dielectric barrier discharge is used to generate non-thermal plasma in a packed bed of solid catalyst particles acting as dielectric in this study. The size of the catalyst particle affects gas-solid phase chemical reactions. At the same time, the geometry of the particles affects the space factor of the packing and the characteristics of the dielectric barrier discharge, such as power. The NOx removal efficiency is also affected. The results of this study show that the diameter of the catalyst particle affects NOx removal efficiency. A minimum peak value of discharge power can be found at a specific particle diameter for a given reactor and power supply. NOx removal efficiency increased with the size of the catalyst to a peak before decreasing on a similar pattern. Therefore an optimum pellet size can be found that that gives maximum removal efficiency. In a catalyst packed bed reactor assisted by dielectric barrier discharge it is important to choose the optimum diameter of catalyst particle.
KeywordsNon-Thermal Plasma Dielectric Barrier Discharge De-NOx Catalyst Particle Diameter
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- 1.Gong Daguo, Xie Chunmei, Zhao Junke. Plasma technology for purification of vehicle exhaust, Chongqing environmental sciences (China), 2003, 25(2): 28–31.Google Scholar
- 2.Huang Liwei, Hitoki Matsuda. Removal of NOx by pulsed corona reactor combined with in situ absorption. Journal of chemical industry and engineering (China). 2004, 55(6).Google Scholar
- 3.Yoshihiko Matsui, K. Takashima, A. Mizuno. Simultaneous removal NOx and DEP from diesel engine exhaust using plasma and oxidative catalyst. SAE Technical paper, No. 2003-01-1185. 2003: 111–119.Google Scholar
- 5.Y. Matsi, K. Takasima, A. Mizuno. After-treatment of NOx using combination of Non-Thermal Plasma and oxidative catalyst prepared by novel impregnation. J. of Advanced oxidation. 2005, 8(2): 255–261.Google Scholar
- 8.Ashraf Yehia, Akira Mizuno. Calculation of the electrical power dissipated in silent discharge reactors. Journal of applied physics 98. 043305 (2005).Google Scholar
- 9.Godoy-Cabrera, R. Lopez-Callejas, R. Valencia, et. al. Effect of air-oxygen and argon-oxygen mixtures on dielectric barrier discharge decomposition of toluene. Brazilian Journal of Physics. Vol. 34 no. 4 Dec. 2004.Google Scholar