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Hydrogen Photo-Production from Glycerol Using Nickel-Doped TiO 2 Catalysts: Effect of Catalyst Pre-Treatment

Author

Listed:
  • Jesús Hidalgo-Carrillo

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

  • Juan Martín-Gómez

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

  • Julia Morales

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

  • Juan Carlos Espejo

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

  • Francisco José Urbano

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

  • Alberto Marinas

    (Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Finay Nanoquímica (IUNAN), Universidad de Córdoba, E-14071 Córdoba, Spain)

Abstract

In the present piece of research, hydrogen production via the photo-reforming of glycerol (a byproduct from biodiesel generation) is studied. Catalysts consisted of titania modified by Ni (0.5% by weight) obtained through deposition–precipitation or impregnation synthetic methods (labelled as Ni-0.5-DP and Ni-0.5-IMP, respectively). Reactions were performed both under UV and solar irradiation. Activity significantly improved in the presence of Ni, especially under solar irradiation. Moreover, pre-reduced solids exhibited higher catalytic activities than untreated solids, despite the “in-situ” reduction of nickel species and the elimination of surface chlorides under reaction conditions (as evidenced by XPS). It is possible that the catalyst pretreatment at 400 °C under hydrogen resulted in some strong metal–support interactions. In summary, the highest hydrogen production value (ca. 2600 micromole H 2 ·g −1 ) was achieved with pre-reduced Ni-0.5-DP solid using UV light for an irradiation time of 6 h. This value represents a 15.7-fold increase as compared to Evonik P25.

Suggested Citation

  • Jesús Hidalgo-Carrillo & Juan Martín-Gómez & Julia Morales & Juan Carlos Espejo & Francisco José Urbano & Alberto Marinas, 2019. "Hydrogen Photo-Production from Glycerol Using Nickel-Doped TiO 2 Catalysts: Effect of Catalyst Pre-Treatment," Energies, MDPI, vol. 12(17), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:17:p:3351-:d:262513
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    Cited by:

    1. Diego Luna & Rafael Estevez, 2022. "Optimization of Biodiesel and Biofuel Process," Energies, MDPI, vol. 15(16), pages 1-4, August.

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