Characteristic of repeated thermal decomposition of ozone

Abstract

It is well-known that concentration of generated ozone by ozone generator with dielectric barrier discharge (DBD) using high purity oxygen as a fed gas is decreased with time. The phenomenon is called "Ozone Zero Phenomenon" (OZP). As one of factors responsible for occurrence of this phenomenon is speculated to be an influence from electrode surface, we have focused our investigation on electrode surface heating generated by electrical discharge. In this paper, we studied the behavior of thermal decomposition ozone flowing ozone into the heated stainless steel pipe, and examined the temporal change of the decomposition rate of ozone. In the results, when ozone decomposition in stainless steel pipe that have not been exposed to ozone, decomposition rate of ozone has a momentarily sharp peak after that was stable. Subsequently, it was repeated thermal decomposition of ozone under the same condition we couldn't have the same results of high decomposition rate of ozone. Over 180°C of heating temperature of stainless steel pipe, when ozone concentration flowing into the stainless steel pipe is high, decomposition rate of ozone is high. And also we found that temperature of stainless steel pipe was increasing. It was thought that cause of the temperature rise that occurs the heat generated in the ozone decomposition.