Geochemical reactions of Na-montmorillonite in dissolved scCO2 in relevance of modeling caprock behavior in CO2 geological storage

Szabó, Zsuzsanna; Hegyfalvi, Csaba; Freiler-Nagy, Ágnes; Udvardi, Beatrix; Kónya, Péter; Király, Csilla; Székely, Edit; Falus, György

doi:10.3311/ppch.12850

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…Ugyanakkor fontos, hogy a modellek folyamatosan kalibrálva, pontosítva legyenek, mivel az ezekből nyert információ elengedhetetlen a hidrogéntárolók nagyobb léptékű tervezéséhez. A hidrogéntárolást célzó geokémiai modellezés még gyerekcipőben jár (Amid-Mignard-Wilkinson 2016;Hemme-van Berk, 2018;Yekta-Pichavant-Audigane 2018), például a CO 2tárolást vizsgáló modellekkel szemben (Szabó et al 2019), amelyet jól szemléltet, hogy a hidrogénes modellek rosszul képezik le a hasonló kondíciójú kísérleteket. Ennek egyik oka lehet, hogy a geokémiai modellezéshez használt adatbázisok jelenleg nagymértékű kalcitoldódást mutatnak (Bo et al 2021;Zeng et al 2022), amelyet a kísérleti eredmények nem igazolnak (Gelencsér et al 2023), valamint hogy kevesebb modellezési és kísérleti tapasztalat van a hidrogénnel.…”

Section: A Modellezés Korlátaiunclassified

A felszín alatti hidrogéntárolás kőzetalkotó ásványokra gyakorolt hatása a Pannon-medencében

Gelencsér,

Tóth,

Németh

et al. 2024

ScientSec

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Összefoglalás. Az energiaigény és a megújuló energiaforrásokból származó kínálat között fennálló szezonális eltérés áthidalható a hidrogéngáz bevezetésével az energiaellátásba. A nagy léptékű energiatárolás hidrogén formájában a felszín alatti térben lehetséges. Azonban a kőzet pórusterében az injektált hidrogén hatására végbemenő reakciók nemcsak a kitermelendő hidrogén mennyiségét és minőségét csökkentik, de a kőzet hosszabb távú állékonyságát is ronthatják. A Kárpát-Pannon régióban jelentős mennyiségben találhatók porózus kőzetek, amelyek hidrogéntárolásra is alkalmasak lehetnek. Ugyanakkor, ezek a kőzetek változatos ásványos összetételük miatt reakcióba léphetnek a hidrogénnel. Vizsgálatunk célja, hogy megismerjük a kőzetalkotó ásványok viselkedését pórusvíz és hidrogén jelenlétében, amely elengedhetetlen a rezervoár tárolási potenciáljának felméréséhez. Summary. One of the key substances in the modern-day energy transition is hydrogen, which can be utilized as an energy storage chemical substance. To store hydrogen on the scales required for global hydrogen economy, porous geological formations should be considered. However, geochemical challenges associated with hydrogen storage in sedimentary formations are still not well understood. Mineral dissolution and precipitation, as a result of hydrogen injection into the rocks not only can decrease the quality and the quantity of the stored hydrogen but may have an impact on the rock integrity as well. The Carpathian Pannonian region is rich in porous rocks, which could serve as hydrogen storage sites. However, many of them show various mineralogical compositions, which could behave differently under high hydrogen partial pressure. The main objective of our study is to predict geochemical reactions among rock-forming minerals, pore water and hydrogen. For this purpose, we apply analytical techniques and geochemical modeling. The subject of this research is the Late Miocene Szolnok Sandstone Formation located in the Pannonian Basin, Carpathian-Pannonian Region. In the future this Formation can play a significant role in hydrogen storage, due to its favorable reservoir geological and petrophysical characteristics. X-ray diffraction analyses were carried out, polished and thin sections were prepared for petrographic and geochemical analyses. The collected data were used in the PHREEQC modeling environment. In the first stage, equilibrium batch models were made to assess the potential long-term impacts of hydrogen on the reservoir rock and the effect of the geological environment. The modeling results of the project showed that hydrogen almost does not react with silicates (e.g., quartz). Possible hydrogen loss can occur due to redox reactions. Pyrite (FeS2) can react with hydrogen producing hydrogen sulfide (H2S) and since petrography has revealed that the studied sandstones have pyrite as accessory mineral.

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Section: A Modellezés Korlátaiunclassified

A felszín alatti hidrogéntárolás kőzetalkotó ásványokra gyakorolt hatása a Pannon-medencében

Gelencsér,

Tóth,

Németh

et al. 2024

ScientSec

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“…[7] Reactivity of carbon dioxide, especially its effect on shifting chemical equilibrium is also critical when its geological sequestration is considered in deep saline aquifers. [8] Supercritical water has especially high reactivity, being a critical issue when it is applied as coolant in a nuclear power plant [9], furthermore the possibility of unintended phase transitions has to be also carefully considered. [10] The most well-known applications of supercritical fluids and especially of carbon dioxide are the extractions of plant raw materials.…”

Section: This Issue Of the Periodica Polytechnica Chemicalmentioning

confidence: 99%

Preface

Imre

Székely

2019

Period. Polytech. Chem. Eng.

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This issue of the Periodica Polytechnica ChemicalEngineering is devoted to contributions in connection with the Applications of Supercritical Fluids 2018 conference, which was held at the Budapest University of Technology and Economics, Budapest, Hungary on 17 May, 2018. This was the 8th conference of the series initiated by Prof Béla Simándi in 1996.A substance is called a supercritical fluid at temperatures and pressures above the critical point of the given substance. However, for practical applications, instead of this thermodynamics based definition, the term supercritical is used in a much wider meaning and includes near-critical fluids, compressible liquids, pressurized gases, expanded liquids etc., based on their common behavior resulting from the relative proximity of the critical point of the main component of the mixture. When the pressure and temperature of solvents or their mixtures are relatively close to the critical point of the solvent we obtain a phase with largely variable properties; density, solvent power, diffusion coefficient, specific heat capacity, dielectric constant, viscosity etc. can be changed even by orders of magnitude by a simple modification of process parameters like pressure and temperature. Applications of supercritical fluids nowadays are very diverse. Extraction of solid matrices, typically plants and the de-asphalting of vacuum residue of crude oil, were the first important applications; supercritical chromatography, impregnation of wood, micronisation and particle formation, production of porous materials including aerogels, special heat transfer applications are examples of more recent applications.The goal of the conference series has always been to give an overview of the most exciting progress in the field of supercritical fluids of and for Hungarian researchers and professionals from industry. While the original focus of the conference was the application of supercritical fluids in chemical analysis, and chemical and food sectors, this year the scope was wider and included applications related to energy science as well.In the four sessions 17 lectures were presented, including Katalin Kamarás (Hungarian Academy of Sciences; nanotubes), Gerard Hofland (FeyeCon; drying of herbs), Ulrich Deiters (University of Cologne; phase equilibria) and Edit Székely (BME; hydrothermal liquefaction) as keynote speakers. In the coffee-breaks there was possibility for poster presentations and informal discussions of the nearly hundred participants. We would like to take this opportunity to thank the sponsors of the conference for their contributions (in alphabetic order): ABL&E-JASCO Magyarország Kft.,

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“…Sodium montmorillonite (Na-MMT) is one of the most abundant industrial materials on earth. Its special structural and mechanical properties have important implications for building foundation and seismic design, , nuclear waste disposal, , wastewater treatment, CO 2 geologic sequestration, , and oil extraction . In these fields, predicting its compression behaviors not only can optimize the engineering design but also can improve resource utilization.…”

Section: Introductionmentioning

confidence: 99%

Microscale Normal Compression Behaviors of Clay Aggregates: A Coarse-Grained Molecular Dynamics Study

Tong,

Yu,

Wang

et al. 2024

Langmuir

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Given the limitations of micromechanical experiments and molecular dynamics simulations, the normal compression process of clay aggregates was simulated under different vertical pressures (P), numbers of particles, loading methods, and environments by a Gay−Berne potential model. On the basis of the variations of particle orientation and the distribution of stacks, the evolution of deformation and stresses was elucidated. The results showed that the effects of the pressure level and loading environment on the deformation were significant. In the range of 0.1−10 MPa, the changes in the void ratio were essentially the evolution of the distribution of stacks determined by attractive short-range van der Waals interactions. The deformation under constant pressure was larger than that under step loading. Because the interactions between clay particles were mainly controlled by mechanical force when in the range of 40−100 MPa, the void ratios under various loading conditions were consistent. It was also found that changes in three-dimensional stresses during compression were dependent on those of the distribution of stacks. In the vacuum environment, owing to the lateral movement of interlocked small stacks, the horizontal stress decreased. The lateral pressure coefficients (k) were greater in an atmospheric environment because the anisotropic particle orientation was relatively less obvious. In the range of 10−100 MPa, when the loading path became longer, k was similar in vacuum but became smaller in an atmosphere. If the initial loading pressure was increased, the number of large stacks sharply increased and the anisotropy was significant in a vacuum environment, which was less prone to lateral expansion. In contrast, more consistent particle arrangements were maintained in an atmosphere. This work will be conducive to explaining experimental observations of long-term ripening.

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Geochemical reactions of Na-montmorillonite in dissolved scCO2 in relevance of modeling caprock behavior in CO2 geological storage

Cited by 8 publications

References 24 publications

A felszín alatti hidrogéntárolás kőzetalkotó ásványokra gyakorolt hatása a Pannon-medencében

A felszín alatti hidrogéntárolás kőzetalkotó ásványokra gyakorolt hatása a Pannon-medencében

Preface

Microscale Normal Compression Behaviors of Clay Aggregates: A Coarse-Grained Molecular Dynamics Study

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