Design of an efficient photocatalytic reactor for the decomposition of gaseous organic contaminants in air

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[1] Lee, David Minzae
[2] Yun, Hyeong Jin
[3] Yu, Sungju
[4] Yun, Seong Jin
[5] Lee, Sun Young
[6] Kang, Sang Hyeon
[7] Yi, Jongheop
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Yi, J. (jyi@snu.ac.kr) | 1600年 / Elsevier B.V.卷 / 187期
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Here; a strategy for decomposing gaseous organic contaminants by photocatalytic reactions is reported. A photocatalytic reactor is designed; based on an open tubular reactor with a UV light source installed at the center of the glass tube to permit the vertical irradiation of light onto the photocatalyst. TiO2 immobilized on a stainless steel plate and a fiber based material; respectively; are placed on the inner wall of an open tubular reactor. The fibers of felt induce wake and eddy flow near the inner surface of the reactor; resulting in compression of boundary layer. The compressed boundary layer provides a higher probability of contact between organic contaminants and the photocatalyst; consequently resulting in the enhanced photocatalytic oxidative decomposition of organic compounds. The inlet of photoreactor is modified in order to better control the bulk stream to form spiral-like flow. The reactor with a single tangent inlet exhibits the highest photocatalytic performance among the reactors examined; as an evidence of the improved probability of contact. Importantly; the reactor with a single tangent inlet; in which TiO2 immobilized felt is installed; maintains its photocatalytic activities for as long as twenty days. © 2012 Elsevier B.V;
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