Abstract
We had been researching improvement of NOx removal by superimposing sound wave on discharge plasma. The Sound wave influences not only the discharge but also the NOx removal. In this paper, we focused on gas flow change by sound wave and influence to NO removal of this gas flow. The experiment is carried out by using a reactor having four discharge gaps. The discharge space, the electrode position and inlet position were changed in this experiment. As a result, the effect of acoustic standing wave to NO removal prominently appeared with decreasing ratio of discharge space. It is because the gas stream in the reactor is changed by irradiating sound wave. With changing electrode position, it is clarified that NO removal depends on particle velocity in case of irradiating acoustic standing wave. With changing gas inlet position, the NO removal characteristics of 0mm and 100mm are almost the same. This result shows that sample gas has flowed to the distance of 100mm from the node of sound pressure distribution. Particle velocity, which NO removal begins to increase, was 0.6-0.8m/s in case of all electrode position. This shows that change of gas flow begins to take place more than particle velocity of 0.6-0.8m/s.
