Studies of high concentration O_3 production using on-off narrow gap barrier discharge and its spatial transfer

采用传统的圆柱阻挡放电法制备O_3。放电管长300mm， φ 20mm。外电极采用覆盖在厚度为1.0 mm的玻璃制电介质上的铝薄膜。放电间隙为0.2 mm，放电间隙内为不锈钢管制成的内电极。在两个电极之间施加频率为10 kHz的连续开关调制电源。以21min的流量将压力约为1atm的O_2气体送入排气管。在通电3ms、关断100ms时，与放电功率保持在0.2 W时相比，O_3的屈服率提高了20%以上。采用上述两根放电管的空间转移放电系统（即所谓的继电器系统）可获得更高的O3屈服率。两根管子平行地安装在一个圆柱形不锈钢容器内。这两根管子是用开关电源操作的，同时调节管子的开关开关，使其不重叠。结果表明，采用继电器系统的O_3屈服率比单管的O_3屈服率大2倍。

A conventional cylindrical barrier discharge was used to produce O_3. The discharge tube was 300mm in length and 20mm φ. Thin Al film covered over a glass-made dielectric with 1.0 mm in thiskness was used as the outer electrode. The discharge gap was 0.2 mm, inside of which was the inner electrode made of stainless steel tube. A continuous and on-off modulated power supply, of which frequency was 10 kHz was applied between the two electrode. O_2 gas about 1 atm pressure was fed to the discharge tube with 21min flow rate. For 3 ms on and 100 ms off, the yielding rate of O_3 was improved more than 20% compared with the continuous discharge, where the discharged power was kept at 0.2 W. A spatial transfer discharge system (the so-called relay system) using two discharge tubes above discribed was used to obtain more high O3 yielding rate. Two tubes were installed in parallel within a cylindrical stainless steel vessel. These two tubes were operated with the on-off power supply, while the on-off turning for the tubes was adjusted so as not to overlap each other. As the result, the O_3 yielding rate using the relay system was 2 times larger than that of one tube.