Influence of Pellet Shape of Ferro-Electric Packed-Bed Plasma Reactor on Ozone Generation and NO Removal
K. Takaki1, S. Takahashi1, S. Mukaigawa1, T. Fujiwara1, K. Sugawara2 and T. Sugawara2
1 Department of Electrical and Electronic Engineering, Iwate University, Japan
2 Department of Materials-process Engineering and Applied Chemistry for Environments, Akita University, Japan
Abstract
An influence of pellet shape on performance of ferro-electric packed-bed plasma reactor for ozone generation and/or nitrogen monoxide (NO) removal was investigated experimentally. The plasma reactor consisted of a center metal rod electrode, glass tube and spherical or hollow cylindrical shaped ferro-electric pellets packed in the discharge area. Barium Titanate (BaTiO3) was used as ferro-electric materials which had 10,000 dielectric constant. Pulse high voltage of 10 kV was applied to the center electrode with 1 kHz repetitive rate using a MOS-FET switch pulse generator. Aluminum tape was used as ground electrode and was wrapped around the glass tube. The ozone yield was improved by changing the pellet shape from sphere to hollow cylinder. NO removal efficiency also increased by changing pellet shape from sphere to hollow cylinder. In case of the spherical shaped pellet, the ozone generation and the NO removal of 3.3 mm diameter pellets showed higher efficiency than those of 2.4 mm diameter pellets.
Keywords - Packed-bed, Non-thermal plasma, Ferro-electric, Ozone, NOx removal
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