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Photocatalytic water splitting in a fluidized bed system: Computational modeling and experimental studies

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  • Reilly, Kevin
  • Wilkinson, David P.
  • Taghipour, Fariborz

Abstract

Photocatalytic water splitting in a novel, UV-irradiated fluidized bed reactor system with Pt-deposited titanium dioxide (TiO2) particles has been explored as an alternative approach to hydrogen production. A model describing the water splitting performance of the fluidized bed system was developed through a holistic approach combining fluidized bed theory, mass transfer effects, an optical model, and a proposed mechanism for the parasitic Pt-catalysed back reaction of H2 and O2. The model was validated experimentally using fluidizable Pt-deposited TiO2 particles. It was found that the efficiency of the fluidized bed water splitting system is dependent on the rate of mass transfer in the gas–liquid separator, while the overall rate of hydrogen evolution was found to vary with the height and density of the photocatalyst bed in the reactor; all of which are functions of the fluidization flow rate. It is shown that maximizing the rate of mass transfer in the gas–liquid separator can greatly diminish losses due to the Pt-catalysed back reaction of H2 and O2, yielding significant gains in efficiency and the overall rate of hydrogen production. The application of the model to the design of the fluidized bed water splitting system, the sub-systems and the photocatalyst particles is discussed.

Suggested Citation

  • Reilly, Kevin & Wilkinson, David P. & Taghipour, Fariborz, 2018. "Photocatalytic water splitting in a fluidized bed system: Computational modeling and experimental studies," Applied Energy, Elsevier, vol. 222(C), pages 423-436.
    • Handle: RePEc:eee:appene:v:222:y:2018:i:c:p:423-436
    DOI: 10.1016/j.apenergy.2018.03.020
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    References listed on IDEAS

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    1. Ni, Meng & Leung, Michael K.H. & Leung, Dennis Y.C. & Sumathy, K., 2007. "A review and recent developments in photocatalytic water-splitting using TiO2 for hydrogen production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(3), pages 401-425, April.
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    2. Jiali Wang & Jiajun Lu & Xiuwen Zhao & Guichao Hu & Xiaobo Yuan & Junfeng Ren, 2023. "Two-dimensional Janus AsXY (X = Se, Te; Y = Br, I) monolayers for photocatalytic water splitting," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(2), pages 1-10, February.
    3. Kierzkowska-Pawlak, Hanna & Tyczkowski, Jacek & Jarota, Arkadiusz & Abramczyk, Halina, 2019. "Hydrogen production in liquid water by femtosecond laser-induced plasma," Applied Energy, Elsevier, vol. 247(C), pages 24-31.
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    5. Fang, Juan & Liu, Qibin & Guo, Shaopeng & Lei, Jing & Jin, Hongguang, 2019. "Spanning solar spectrum: A combined photochemical and thermochemical process for solar energy storage," Applied Energy, Elsevier, vol. 247(C), pages 116-126.

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