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MW-Assisted Regeneration of 13X Zeolites after N 2 O Adsorption from Concentrated Streams: A Process Intensification

Author

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  • Eugenio Meloni

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

  • Marco Martino

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

  • Mariaconcetta Pierro

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

  • Pluton Pullumbi

    (Air Liquide, Paris Innovation Campus. 1, Chemin de la Porte des Loges, 78350 Les Loges en Josas, France)

  • Federico Brandani

    (Air Liquide, Paris Innovation Campus. 1, Chemin de la Porte des Loges, 78350 Les Loges en Josas, France)

  • Vincenzo Palma

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

Abstract

N 2 O has a global warming potential about 300 times higher than CO 2 , and even if its contribution to the greenhouse effect is underrated, its abatement in industrial production’s tail gas has become imperative. In this work, we investigate the feasibility of the microwave (MW)-assisted regeneration of a 13X zeolite bed for N 2 O capture from tail gases. Several consecutive adsorption–desorption cycles were performed to verify the microwave heating effect on the zeolite’s adsorption properties. The results of the experimental tests, performed at N 2 O concentrations of 10, 20 and 40% vol, highlighted that (i) the steps are perfectly repeatable in terms of both adsorbed and desorbed amount of N 2 O, meaning that the MWs did not damage the zeolite’s structure, (ii) the presence of both H 2 O and O 2 in the feed stream irreversibly reduces the adsorbent capacity due to nitrites and nitrates formation, and (iii) the presence of H 2 O alone with N 2 O still reduces the adsorbent capacity of the zeolites, which can be recovered through MW-assisted regeneration at 350 °C. Moreover, the MW-assisted TSA assured an energy and purge gas saving up to 63% and 82.5%, respectively, compared to a traditional regeneration process, resulting in effective process intensification.

Suggested Citation

  • Eugenio Meloni & Marco Martino & Mariaconcetta Pierro & Pluton Pullumbi & Federico Brandani & Vincenzo Palma, 2022. "MW-Assisted Regeneration of 13X Zeolites after N 2 O Adsorption from Concentrated Streams: A Process Intensification," Energies, MDPI, vol. 15(11), pages 1-22, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:4119-:d:831187
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    References listed on IDEAS

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    1. Eugenio Meloni & Giuseppina Iervolino & Concetta Ruocco & Simona Renda & Giovanni Festa & Marco Martino & Vincenzo Palma, 2022. "Electrified Hydrogen Production from Methane for PEM Fuel Cells Feeding: A Review," Energies, MDPI, vol. 15(10), pages 1-34, May.
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