Dielectric Particle Effects on Dichloromethane Decomposition and Mineralization in a Non-thermal Plasma Packed-bed Reactor

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  • 非平衡プラズマ反応器内でのジクロロメタンの分解・無機化特性に及ぼす充填誘電体粒子の影響
  • ヒヘイコウ プラズマ ハンノウキ ナイ デ ノ ジクロロメタン ノ ブンカイ ・ ムキカ トクセイ ニ オヨボス ジュウテン ユウデンタイ リュウシ ノ エイキョウ

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Effects of four dielectric particles of BaTiO3, α-Al2O3, γ-Al2O3, and Pt/γ-Al2O3 on dichloromethane decomposition and mineralization were investigated using a lab-scale gas-flow type non-thermal plasma packed-bed reactor at ambient temperature in the air flow condition.<br>　Results obtained under the present experimental conditions demonstrated that more than 90% of dichloromethane was decomposed and that more than 80% of dichloromethane was mineralized in the non-thermal plasma reactor packed with all particles at input electric power higher than 40W. Higher CO2 selectivity was obtained in γ-Al2O3 and Pt/γ-Al2O3 particle beds than in BaTiO3 and α-Al2O3 particles beds. The Cl produced by the decomposition of dichloromethane was adsorbed onto the surface of γ-Al2O3 and Pt/γ-Al2O3. Moreover, CO2 selectivity decreased from 0.94 to 0.30. It became constant during the decomposition of dichloromethane in the γ-Al2O3 particle bed. In contrast, almost all the Cl produced by the decomposition of dichloromethane was discharged from the reactor after being converted to HCl and Cl2 in α-Al2O3 particles bed at input electric power higher than 50W.

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