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Liquid vs. Gas Phase CO 2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

Author

Listed:
  • Alberto Olivo

    (CatMat Lab, Department of Molecular Sciences and Nanosystems, Ca’ Foscari University Venice and Consortium INSTM, RU of Venice, Via Torino 155, 30172 Venezia, Italy)

  • Elena Ghedini

    (CatMat Lab, Department of Molecular Sciences and Nanosystems, Ca’ Foscari University Venice and Consortium INSTM, RU of Venice, Via Torino 155, 30172 Venezia, Italy)

  • Michela Signoretto

    (CatMat Lab, Department of Molecular Sciences and Nanosystems, Ca’ Foscari University Venice and Consortium INSTM, RU of Venice, Via Torino 155, 30172 Venezia, Italy)

  • Matteo Compagnoni

    (Chemical Plants and Industrial Chemistry Group, Department of Chemistry, Università Degli Studi di Milano, Consortium INSTM, RU of Milano Università and CNR-ISTM, via C. Golgi 19, 20133 Milan, Italy)

  • Ilenia Rossetti

    (Chemical Plants and Industrial Chemistry Group, Department of Chemistry, Università Degli Studi di Milano, Consortium INSTM, RU of Milano Università and CNR-ISTM, via C. Golgi 19, 20133 Milan, Italy)

Abstract

The use of carbon dioxide, the most concerning environmental issue of the 21st century, as a feedstock for fuels productions still represents an innovative, yet challenging, task for the scientific community. CO 2 photoreduction processes have the potential to transform this hazardous pollutant into important products for the energy industry (e.g., methane and methanol) employing a photocatalyst and light as the only energy input. In order to design an effective process, the high sustainability of this reaction should be matched with the perfect reaction conditions to allow the reactant, photocatalyst, and light source to come together: therefore, the choice of reaction conditions, and in particular its medium, is a crucial issue that needs to be investigated. Throughout this paper, a careful study of carbon dioxide photoreduction in liquid and vapour phases are reported, focusing on their effect on catalyst performances in terms of light harvesting, productivity, and selectivity. Different from most papers in the literature, catalytic tests were performed under extremely low light irradiance, in order to minimise the primary energy input, highlighting that this experimental variable has a great effect on the reaction pathway and, thus, product distribution.

Suggested Citation

  • Alberto Olivo & Elena Ghedini & Michela Signoretto & Matteo Compagnoni & Ilenia Rossetti, 2017. "Liquid vs. Gas Phase CO 2 Photoreduction Process: Which Is the Effect of the Reaction Medium?," Energies, MDPI, vol. 10(9), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1394-:d:111792
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    References listed on IDEAS

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    4. Holloway, S., 2005. "Underground sequestration of carbon dioxide—a viable greenhouse gas mitigation option," Energy, Elsevier, vol. 30(11), pages 2318-2333.
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    1. Matteo Tommasi & Francesco Conte & Mohammad Imteyaz Alam & Gianguido Ramis & Ilenia Rossetti, 2023. "Highly Efficient and Effective Process Design for High-Pressure CO 2 Photoreduction over Supported Catalysts," Energies, MDPI, vol. 16(13), pages 1-20, June.

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