中文摘要：

低温等离子体技术是一种很有效的处理汽车尾气的方法。填充床式反应器内，填充介质球粒径的大小对处理效果有很大的影响。为提高汽车尾气处理效果，使用线筒式DBD等离子体反应器和工频高压电源，考察了填充介质球粒径对处理效果的影响规律。电磁场仿真结果表明，填充玻璃球后。气隙电场明显增强，且增强的效果随着填充球粒径的增大而增大。实验结果也进一步证实,NO转化率、NOx脱除率随填充玻璃球粒径的增大而提高，能量利用率也随之提高。因此，对于工频电源，选择粒径较大的填充介质球无论在处理效率还是能量利用效率上，都有更好的效果。

英文摘要：

The effect of particles size on the treatment efficiency was investigated using a coaxial dielectric barrier discharge （DBD） plasma rector powered by ac high-voltage power at 50 Hz. Simulation of electric field distribution shows that electric field in gap spacing between two interacting glass beads is enhanced. Enhancement effect increases with the increase of glass bead diameter. Experimental results show that the conversion rate of NO, removal rate of NOx and energy utilization efficiency increase with the increase of glass bead diameter, which is consistent to the simulation results. These results indicate that using bigger diameter of glass beads is a better choice not only on the removal rate, but also on the energy utilization efficiency.