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AuthorAl-Harbi, Alankaa
AuthorAl-Marri, Mohammed
AuthorCarchini, Giuliano
AuthorSaad, Mohammed
AuthorHussein, Ibnelwaleed A.
Available date2024-01-23T08:38:35Z
Publication Date2023-12-05
Publication NameACS Omega
Identifierhttp://dx.doi.org/10.1021/acsomega.3c06644
CitationAl-Harbi, A., Al-Marri, M., Carchini, G., Saad, M., & Hussein, I. A. (2023). Hydrogen Underground Storage in Silica-Clay Shales: Experimental and Density Functional Theory Investigation. ACS omega, 8(48), 45906-45913.‏
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85179834214&origin=inward
URIhttp://hdl.handle.net/10576/51088
AbstractIn the context of reducing the global emissions of greenhouse gases, hydrogen (H2) has become an attractive alternative to substitute the current fossil fuels. However, its properties, seasonal fluctuations, and the lack of extended energy stability made it extremely difficult to be economically and safely stored for a long term in recent years. Therefore, this paper investigated the potential of shale gas reservoirs (rich and low clay-rich silica minerals) to store hydrogen upon demand. Density functional theory molecular simulation was employed to explore hydrogen adsorption on the silica-kaolinite interface, and the physisorption of hydrogen on the shale surface is revealed. This is supported by low adsorption energies on different adsorption configurations (0.01 to −0.21 eV), and the lack of charge transfer showed by Bader charge analysis. Moreover, the experimental investigation was employed to consider the temperature (50-100 °C) and pressure (up to 20 bar) impact on hydrogen uptake on Midra shale, specifically palygorskite (100%), which is rich in silicate clay minerals (58.83% SiO2). The results showed that these formations do not chemically or physically maintain hydrogen; hence, hydrogen can be reversibly stored. The results highlight the potential of shale gas reservoirs to store hydrogen as no hydrogen is adsorbed on the shale surface, so there will be no hydrogen loss and no adverse effect on the shale’s structural integrity, and it can be safely stored in shale reservoirs and recovered upon demand.
SponsorThis work was made possible by the support of the Qatar National Research Fund (QNRF), grant reference number GSRA9-L-2-0511-22007 and through grant no. NPRP13S-1231-190009. The statements made herein are solely the responsibility of the authors.
Languageen
PublisherAmerican Chemical Society
SubjectExperimental
TitleHydrogen Underground Storage in Silica-Clay Shales: Experimental and Density Functional Theory Investigation
TypeArticle
Pagination45906-45913
Issue Number48
Volume Number8
dc.accessType Open Access


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