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Ozone Catalytic Oxidation of Gaseous Toluene over MnO2-Based Ozone Decomposition Catalysts Immobilized on a Nonwoven Fabric

Degradation of toluene gas by ozone catalytic oxidation (OZCO) by using a MnO 2 -based ozone decomposition catalyst (ODC) was investigated to clarify the reactive site of ODC material with O 3 . An optimum structure for the ODC to remove O 3 and toluene were proposed. For honeycomb ODC, toluene degr...

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Bibliographic Details
Published in:Aerosol and air quality research 2017, Vol.17 (8), p.2110-2118
Main Authors: Sekiguchi, Kazuhiko, Kurita, Yuki, Sankoda, Kenshi, Namiki, Norikazu, Yasui, Fumio, Tamura, Hajime
Format: Article
Language:English
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Summary:Degradation of toluene gas by ozone catalytic oxidation (OZCO) by using a MnO 2 -based ozone decomposition catalyst (ODC) was investigated to clarify the reactive site of ODC material with O 3 . An optimum structure for the ODC to remove O 3 and toluene were proposed. For honeycomb ODC, toluene degradation by OZCO occurred only around the entrance of the honeycomb ODC, and we expected that a thinner ODC would increase the toluene degradation efficiency. A nonwoven fabric on which ODC was immobilized was developed to decompose O 3 and volatile organic compounds simultaneously. The toluene degradation ratio and the mineralization of toluene to CO 2 were determined to evaluate the performance of the fabric. Furthermore, the effects of relative humidity and O 3 concentration on the decomposition and mineralization ratios were also investigated with or without 254 nm UV irradiation (UV 254 ). The fabric decomposed and mineralized toluene to CO 2 , even at low O 3 concentrations. Although high humidity reduced the degradation ratio of toluene, UV 254 irradiation improved the recovery of the degradation ratio and increased the mineralization ratio.
ISSN:1680-8584
2071-1409
DOI:10.4209/aaqr.2017.01.0045