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Title: Photocatalytic oxidation of volatile organic compounds in indoor air
Authors: Leib, Elisabeth
Li, Junhui
Porter, John Francis
Yue, Po-Lock
Keywords: Photocatalytic oxidation
Indoor air
Volatile organic compounds
Issue Date: 1999
Citation: Proceedings of the Asia-pacific Chemical Reaction Engineering Symposium "APCRE 99", Hong Kong SAR, China, June 13-16, 1999, The Hong Kong University of Science and Technology, Hong Kong SAR, China, 1999, p. 443-448
Abstract: Two frequently occurring volatile organic compounds (VOCs), trichloroethylene (TCE) and acetaldehyde were oxidised in a heterogeneous flat bed flow reactor over a titanium dioxide (TiO2) catalyst illuminated by near ultraviolet light. The kinetics of the photooxidation, the effect of mass transfer resistance and the photoefficiency were investigated. The effects of moisture content and residence time on the percentage of TCE oxidised to CO and CO2 were studied. A maximum reaction rate of 19.1 μmol min-1 g-1 TiO2 for TCE and 8.6 μmol min-1 g-1 TiO2 for acetaldehyde was observed. For a residence time of less than 3 minutes, (330 ml min-1 airflow), 100 ppm VOC, 2000 ppm H2O, 2.0 mW cm-2 light intensity and 0.6 g TiO2, 98% of the TCE and 69% of the acetaldehyde were converted.
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