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Structured Catalysts for Non-Thermal Plasma-Assisted Ammonia Synthesis

Author

Listed:
  • Eugenio Meloni

    (Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy)

  • Liberato Cafiero

    (Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy)

  • Marco Martino

    (Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy)

  • Vincenzo Palma

    (Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy)

Abstract

Ammonia has been intensively studied as a clean, sustainable fuel source and an efficient energy storage medium due to its effectiveness as a hydrogen carrier molecule. However, the currently used Haber–Bosch process requires a large fossil fuel input, high temperatures and pressures, as well as a significant capital investment. These constraints prevent decentralized and small-scale ammonia production at the level of small farms and local communities. Non-thermal plasma (NTP) can promote ammonia synthesis in operating conditions in which, in a conventional process, a catalyst is generally not active. In this study, the production of NTP-assisted catalytic ammonia at milder temperatures and ambient pressure was investigated. Four different structured catalysts were prepared and tested using an experimental plant based on a dielectric barrier discharge (DBD) reactor. The effect of the gas hourly space velocity (GHSV) was investigated, as well as the effect of the N 2 /H 2 ratio on catalyst performance. The results evidenced that the best catalytic activity (about 4 mmol h −1 of produced NH 3 ) was obtained using the 10Ni/zeolite 13X sample with the lowest energy consumption, thus highlighting the feasibility of this innovative technology in this field.

Suggested Citation

  • Eugenio Meloni & Liberato Cafiero & Marco Martino & Vincenzo Palma, 2023. "Structured Catalysts for Non-Thermal Plasma-Assisted Ammonia Synthesis," Energies, MDPI, vol. 16(7), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:3218-:d:1114973
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    References listed on IDEAS

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    1. Meloni, Eugenio & Martino, Marco & Palma, Vincenzo, 2022. "Microwave assisted steam reforming in a high efficiency catalytic reactor," Renewable Energy, Elsevier, vol. 197(C), pages 893-901.
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