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Oxidation process of xylene in air using Ag/TiO$$_{2}$$ under electron beam irradiation

電子ビーム照射下におけるAg/TiO$$_{2}$$併用空気中キシレンの酸化過程

箱田 照幸; 松本 加奈江; 水野 彰*; 成田 正*; 小嶋 拓治; 広田 耕一

Hakoda, Teruyuki; Matsumoto, Kanae; Mizuno, Akira*; Narita, Tadashi*; Kojima, Takuji; Hirota, Koichi

塗料工場からの換気ガス中に含まれるキシレンなどの電子ビーム(EB)照射による分解処理技術の開発のために、EB照射と触媒であるAg担持TiO$$_{2}$$を併用して、キシレンやその照射副生成物の分解を促進する触媒設置条件を明らかにするととともに、触媒表面上の酸化反応を定量した。その結果、照射空間の下流への触媒導入により、照射副生成物のCO$$_{2}$$への選択的な酸化が認められ、特にAg担持量が5wt%以上の場合に最大のCO$$_{2}$$生成量が得られることがわかった。さらに、非照射空間における副生成物の酸化反応では照射由来のO$$_{3}$$から解離した活性酸素が照射副生成物の酸化分解に関与している可能性があることを明らかにした。

Oxidation of xylene and its irradiation-induced organic byproducts in air using Ag-loaded TiO$$_{2}$$ (Ag/TiO$$_{2}$$) beds was studied under electron beam (EB) irradiation. The Ag/TiO$$_{2}$$ beds were placed in an irradiation or a non-irradiation space in order to identify the oxidation of xylene/its byproducts by EB irradiation, by catalytic process, and by a combination of the two. Placement of the Ag/TiO$$_{2}$$ bed to the irradiation space resulted in the suppression of xylene decomposition. On the other hand, production of CO$$_{2}$$ was observed in the gas phase of the irradiation space and on the surface of the Ag/TiO$$_{2}$$ pellets placed both in the irradiation and non-irradiation spaces. The concentration of CO$$_{2}$$ became higher when the layer was placed in the non-irradiation space. The production of CO$$_{2}$$ was enhanced by loading of Ag to the TiO$$_{2}$$ pellet surface. The highest concentration of CO$$_{2}$$ was obtained for Ag/TiO$$_{2}$$ with Ag contents greater than 5wt%.

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パーセンタイル:33.50

分野:Engineering, Multidisciplinary

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