Improvement of Dielectric Barrier Discharge Plasma Reactor for Ozone Generation by Electrode Shape

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  • 誘電体バリア放電方式オゾナイザの電極形状による高効率化
  • ユウデンタイ バリア ホウデン ホウシキ オゾナイザ ノ デンキョク ケイジョウ ニ ヨル コウコウリツカ

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Abstract

An effect of electrode shape on ozone generation in dielectric barrier discharge reactor is described in this article. Three different shape electrodes were employed as ground electrodes. A plane electrode is 6 cm in width, and 20 cm in length. A trench electrode has large number of knife-edge rails. A multipoint electrode has large number of four-sided pyramid projections on the plane. A high voltage plane electrode is covered with 0.5 mm thickness alumina layer worked as dielectric barrier. The experimental results show that the breakdown for the multipoint electrode occurs at 7.0 kVpp. This value is lower than 8.4 kVpp that is the breakdown voltage of the plane electrode. The ozone yield increases from 80 g/kWh to 130 g/kWh by changing the electrode shape from the plane to the multipoint. The ozone generation efficiency decreased with increase of the ozone concentration.

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