Channelled optical fibre photoreactor for improved air quality control

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• 作者：Frans Denny ; Jason Scott ; Gang-Ding Peng ; Rose Amal
• 关键词：Photocatalytic ; Titanium dioxide ; Channelled optical fibre ; Ethylene ; Reactor ; Radiation ; Langmuir– ; Hinshelwood
• 刊名：Chemical Engineering Science
• 出版年：2010
• 出版时间：16 January 2010
• 年：2010
• 卷：65
• 期：2
• 页码：882-889
• 全文大小：592 K

文摘

An optical fibre reactor with 30 hexagonal-shaped channels distributed within the optical fibre structure was investigated as a gas-phase photocatalytic reactor. TiO₂ photocatalyst, with SiO₂ sol acting as a binder, was coated on the channel walls at a thickness of 1.5 μm. Effective light propagation lengths of 3.4 and 4.9 cm were observed for incidental angles of 81.5° and 87.1°, respectively. The TiO₂-coated channelled optical fibre reactor (COFR) was assessed for the photocatalytic degradation of gas-phase ethylene. The photocatalytic reaction rate of ethylene degradation was linear with respect to the incident photons. The reaction rate order for the incident photons was determined to be 0.93. Despite a longer effective light propagation length for an incidental angle of 87.1°, the quantum yield was independent of the incidental angle. The independence of the quantum yield on the incident photons and the angle of light incidence was attributed to the COFR design, where the propagating light was wholly confined within the reactor and, in turn, more effectively utilised by the TiO₂.