Photocatalytic decomposition of isopropanol (IPA) in air stream in a continuous TiO2 or Pt/TiO2 catalyst-coated annular photoreactor was demonstrated to be effective at relatively short detention times. The increase of UV light intensity and retention time improved the decomposition of IPA. However, both the apparent quantum yield for IPA decomposition and CO2 production were decreased. A mathematical model combining the continuity equations and Langmuir-Hinshelwood (L-H) kinetics was established to adequately describe the reaction behavior of IPA decomposition in the annular photoreactor with various photocatalysts. The apparent quantum yielded can be modeled and calculated for the decomposition of IPA by photocatalytic oxidation in the annular photoreactor coated with TiO2 and Pt/TiO2.
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Ma et al. (2007) studied this question.
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