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"One of the most common and safest ways of large scale and long-term (several months) storage of hydrogen (H2) is in depleted gas fields. In spite of the safe conditions, undesirable reactions producing gases, such as H2S and CH4, and mineral precipitation/dissolution are possible, which may result in the loss of H2.\nThe objective of our modeling and experimental study is to investigate the rate and extent of H2 induced redox reactions which can occur during underground H2 storage (UHS). Cores, cuttings and pore water samples were collected from a typical Late Miocene-Pliocene sandstone reservoir in the Pannonian Basin. Using detailed petrography and X-ray diffraction data, geochemical models were built to estimate the rate of dissolution of primary minerals.\nTwo types of models are built: 1/ equilibrium simulations, where the geochemical reactions are considered to be instantaneous and 2/ kinetic batch models where interactions among H2, fluid and minerals are studied in time.\nStatic batch experiments (composed by single or more mineral phases, fluid, and H2) are still running which will be comparable with the simulations. These experiments are performed at temperature (100-150°C) and pressure range of the studied formation, expected for UHS.\nPetrography of the sandstones shows that beside quartz, the rock consists of potentially redox sensitive minerals such as calcite, dolomite, detrital and authigenic clay minerals and ~ 1w% sulfide.\nThe first modeling results show that H2 has an impact on sulfides even at higher temperature and pressure, but no significant effect was found on the carbonate phases (calcite, dolomite).", "subjects" : [ { "otype" : "Classification", "mtid" : 10399, "link" : "/api/classification/10399", "label" : "Föld- és kapcsolódó környezettudományok", "published" : true, "snippet" : true }, { "otype" : "Classification", "mtid" : 10416, "link" : "/api/classification/10416", "label" : "Geokémia és geofizika", "published" : true, "snippet" : true } ], "keywords" : [ { "otype" : "Keyword", "mtid" : 5648, "link" : "/api/keyword/5648", "label" : "Central Europe", "published" : true, "oldId" : 5648, "snippet" : true }, { "otype" : "Keyword", "mtid" : 1001460, "link" : "/api/keyword/1001460", "label" : "sandstones", "published" : true, "oldId" : 1001460, "snippet" : true }, { "otype" : "Keyword", "mtid" : 1002919, "link" : "/api/keyword/1002919", "label" : "Pannonian Basin", "published" : true, "oldId" : 1002919, "snippet" : true }, { "otype" : "Keyword", "mtid" : 1377512, "link" : "/api/keyword/1377512", "label" : "Geochemical study", "published" : true, "oldId" : 1377512, "snippet" : true } ], "digital" : true, "printed" : true, "sourceYear" : 2021, "foreignEdition" : true, "foreignLanguage" : true, "fullPublication" : false, "conferencePublication" : true, "nationalOrigin" : true, "missingAuthor" : false, "oaType" : "NONE", "oaCheckDate" : "2024-02-16", "oaFree" : false, "citationCount" : 0, "citationCountUnpublished" : 0, "citationCountWoOther" : 0, "independentCitCountWoOther" : 0, "nationalOriginCitationCount" : 0, "foreignEditionCitationCount" : 0, "doiCitationCount" : 0, "wosCitationCount" : 0, "scopusCitationCount" : 0, "wosScopusCitationCount" : 0, "wosScopusCitationCountWoOther" : 0, "wosScopusIndependentCitationCount" : 0, "wosScopusIndependentCitationCountWoOther" : 0, "independentCitationCount" : 0, "selfCitationCount" : 0, "unhandledCitationCount" : 0, "citingPubCount" : 0, "independentCitingPubCount" : 0, "citingPubCountWoOther" : 0, "independentCitingPubCountWoOther" : 0, "unhandledCitingPubCount" : 0, "citedPubCount" : 0, "citedCount" : 0, "hasCitationDuplums" : false, "userChangeableUntil" : "2021-06-08T15:25:12.769+0000", "directInstitutesForSort" : "Kémiai és Környezeti Folyamatmérnöki Tanszék (BME / VBK); Környezettudományi Doktori Iskola (ELTE / TTK); Litoszféra Fluidum Kutató Laboratórium (ELTE / TTK / Ft_K); Litoszféra Fluidum Kutató Laboratórium (ELTE / TTK); Magyar Bányászati és Földtani Szolgálat; Ásványtani Tanszék (ELTE / TTK / Ft_K)", "ownerAuthorCount" : 7, "ownerInstituteCount" : 52, "directInstituteCount" : 6, "authorCount" : 7, "contributorCount" : 0, "book" : { "otype" : "Book", "mtid" : 32845837, "link" : "/api/publication/32845837", "label" : "Goldschmidt 2021 Virtual Conference : Goldschmidt International Conference on Geochemistry and Related Subjects. 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