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CO 2 Storage in Deep Oceanic Sediments in the form of Hydrates: Energy Evaluation and Advantages Related to the Use of N 2 -Containing Mixtures

Author

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  • Alessia Di Giuseppe

    (CIRIAF-Interuniversity Research Center on Pollution and Environment “Mauro Felli”, Via G. Duranti 67, 06125 Perugia, Italy)

  • Alberto Maria Gambelli

    (Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy)

Abstract

Permanent storage in suitable geological sites and/or deep aquifers is emerging as the most concrete and effective solution to mitigate its increasing concentration in the atmosphere. This article experimentally investigated its storage in deep marine environments in the form of hydrates. Gas hydrates were formed into a small-scale reactor, designed to reproduce marine seafloors. Hydrates were formed with pure carbon dioxide and with CO 2 -based gaseous mixture containing nitrogen at different concentrations, equal, respectively, to 30, 50 and 60 vol%. The results obtained for each mixture were then compared to each other. In particular, the quantity of hydrates formed was evaluated as a function of the thermodynamic conditions selected for the experiments. The energy spent for the process, calculated by considering the cooling and compression phases, was calculated for the unit quantity of hydrates formed and for the unit quantity of carbon dioxide stored. Finally, the energy requirements for gas cooling and for gas compression were calculated separately in order to comprehend the contribution of the single process for each mixture.

Suggested Citation

  • Alessia Di Giuseppe & Alberto Maria Gambelli, 2024. "CO 2 Storage in Deep Oceanic Sediments in the form of Hydrates: Energy Evaluation and Advantages Related to the Use of N 2 -Containing Mixtures," Energies, MDPI, vol. 17(16), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:16:p:4102-:d:1458639
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    References listed on IDEAS

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    1. Aminu, Mohammed D. & Nabavi, Seyed Ali & Rochelle, Christopher A. & Manovic, Vasilije, 2017. "A review of developments in carbon dioxide storage," Applied Energy, Elsevier, vol. 208(C), pages 1389-1419.
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