Modeling of the photocatalytic decomposition of gaseous benzene in a TiO2 coated optical fiber photoreactor |
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Authors: | W Wang Y Ku C M Ma F T Jeng |
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Affiliation: | (1) Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4, Taipei, 106, Taiwan;(2) The Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei, 106, Taiwan |
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Abstract: | Photocatalytic decomposition of benzene in an air stream in a continuous TiO2-coated optical fiber photoreactor (OFP) was demonstrated to be effective at relatively short retention times. An increase
in TiO2 coating thickness, fiber length and retention time improved the decomposition of benzene; however, excessive TiO2 coating thickness and optical fiber length may hamper the reaction. The UV light intensity distribution on and within the
optical fiber was modeled using Snell’s law and UV light energy balance. The modeled profile indicated that the UV light intensity
decreased rapidly along the axial and radial directions of the optical fiber. A mathematical model combining the continuity
equations and Langmuir–Hinshelwood surface kinetics was established to adequately describe the reaction behavior of benzene
decomposition in the OFP with only single TiO2-coated fiber. |
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Keywords: | coating thickness Langmuir– Hinshelwood surface kinetics optical fiber photoreactor quantum yield reactor design equation TiO2 |
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