Decomposition of Phenol in Water using Water Surface Plasma in Wetted-Wall Reactor
M. Sato1, T. Soutome1, S. Mii1, T. Ohshima1, and Y. Yamada2
1 Department of Biological and Chemical Engineering, Gunma University, Japan
2 Masuda Research Laboratory, Co., Ltd., Japan
Abstract
A scaling up of water surface plasma for decomposition of small amount of organic materials was tried using wetted-wall reactor. Water was flowed through the top edge of the cylinder (made of Aluminum or Plexiglas) forming water film inside the cylinder wall and was circulated by a peristaltic pump. Gas phase pulsed plasma was generated from the high voltage electrode located at the center of the cylinder. Two types of plasma mode, streamer and corona discharge plasmas, were observed between the center electrode and water surface on the cylinder surface in the wetted-wall reactor. Phenol was effectively decomposed in the case of streamer discharge generated in argon gas using aluminum cylinder. Water flow rate did not affect to the decomposition rate. Between four kinds of reactors, such as aluminum cylinder and Plexiglas cylinder with different ground electrode position, the aluminum cylinder with argon or oxygen was the most effective to decompose phenol.
Keywords - Water surface plasma, Wetted-wall reactor, Pulsed discharge, Water purification, Phenol decomposition
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