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Photocatalytic oxidation of volatile organic compounds in indoor air

Authors Leib, Elisabeth
Li, Junhui
Porter, John Francis
Yue, Po-Lock
Issue Date 1999
Source Proceedings of the Asia-pacific Chemical Reaction Engineering Symposium "APCRE 99", Hong Kong SAR, China, The Hong Kong University of Science and Technology, Hong Kong SAR, China , 13-16 June 1999, p. 443-448
Summary Two frequently occurring volatile organic compounds (VOCs), trichloroethylene (TCE) and acetaldehyde were oxidised in a heterogeneous flat bed flow reactor over a titanium dioxide (TiO<sub>2</sub>) 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 CO<sub>2</sub> were studied. A maximum reaction rate of 19.1 μmol min<sup>-1</sup> g<sup>-1</sup> TiO<sub>2</sub> for TCE and 8.6 μmol min<sup>-1</sup> g<sup>-1</sup> TiO<sub>2</sub> for acetaldehyde was observed. For a residence time of less than 3 minutes, (330 ml min<sup>-1</sup> airflow), 100 ppm VOC, 2000 ppm H<sub>2</sub>O, 2.0 mW cm<sup>-2</sup> light intensity and 0.6 g TiO<sub>2</sub>, 98% of the TCE and 69% of the acetaldehyde were converted.
Language English
Format Conference paper
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