Pore-scale visualization of hydrogen storage in a sandstone at subsurface pressure and temperature conditions: Trapping, dissolution and wettability

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 629, P. 316 - 325

Published: Sept. 19, 2022

Underground hydrogen (H

Language: Английский

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Role of methane as a cushion gas for hydrogen storage in depleted gas reservoirs

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(76), P. 29663 - 29681

Published: April 30, 2023

Language: Английский

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Pore‐Scale Observations of Hydrogen Trapping and Migration in Porous Rock: Demonstrating the Effect of Ostwald Ripening

Geophysical Research Letters, Journal Year: 2023, Volume and Issue: 50(7)

Published: March 30, 2023

Abstract We use high‐resolution three‐dimensional X‐ray imaging to study hydrogen injection and withdrawal in the pore space of Bentheimer sandstone. The results are compared with a replicate experiment using nitrogen. observe less trapping because initial saturation after drainage is lower due channeling. Remarkably we that imbibition, if sample imaged again 12 hr, there significant rearrangement trapped hydrogen. Many smaller ganglia disappear while larger swell, no detectable change overall gas volume. For nitrogen, fluid configuration largely unchanged. This facilitated by concentration gradients dissolved aqueous phase—Ostwald ripening, estimate time‐scales for this effect be significant, consistent experimental observations. swelling potentially increases connectivity, leading hysteresis more efficient withdrawal.

Language: Английский

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Underground hydrogen storage: A critical assessment of fluid-fluid and fluid-rock interactions

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 72, P. 108473 - 108473

Published: July 26, 2023

Language: Английский

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Trapping, hysteresis and Ostwald ripening in hydrogen storage: A pore-scale imaging study

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 56, P. 1139 - 1151

Published: Jan. 3, 2024

Green hydrogen, produced from surplus electricity during peak production, can be injected into subsurface reservoirs and retrieved high-demand periods. In this study, X-ray tomography was employed to examine hysteresis resulting repeated hydrogen injection withdrawal. An unsteady state experiment performed evaluate the distribution of brine after drainage imbibition cycles: images pore-space configuration fluids were taken immediately once had stopped waiting for a period 16 h with no flow. A Bentheimer sandstone sample length 60 mm diameter 12.8 used, at ambient temperature pore pressure 1 MPa. The gas flow rate decreased 2 ml/min 0.08 over three cycles followed by water flooding, while kept constant. results showed presence capillary migration through Ostwald ripening due diffusion dissolved in brine. These phenomena characterized analysis interfacial curvature, area, connectivity occupancy. tended reside larger spaces, consistent water-wet conditions. stopped, aggregated ganglia single large connected ganglion dominating volume. Moreover, Euler characteristic h, indicating an improvement connectivity. work implies that – mass transport leads less better than would assumed ignoring effect, as done assessments hydrocarbon trapping.

Language: Английский

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Residual trapping capacity of subsurface systems for geological storage of CO2: Measurement techniques, meta-analysis of influencing factors, and future outlook

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 252, P. 104764 - 104764

Published: March 29, 2024

Language: Английский

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Current status of underground hydrogen storage: Perspective from storage loss, infrastructure, economic aspects, and hydrogen economy targets

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 97, P. 112773 - 112773

Published: July 11, 2024

Language: Английский

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Sandstone wettability and mixed gas composition: Unraveling the impact of CO2 in hydrogen geo-storage

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 59, P. 1352 - 1366

Published: Feb. 15, 2024

Underground hydrogen storage (UHS) is gaining interest as a secure, long-term solution for storing in porous geological formations. In UHS, cushion gas like CO2 crucial to maintain the reservoir pressure and optimize recovery. The concept of wettability plays fundamental role determining system's multi-phase displacement characteristics media. However, there gap existing literature regarding sandstone rocks under geo-storage conditions when H2 are injected bulk gases, respectively. To address this gap, we conducted study investigating hysteresis phenomenon by measuring advancing receding contact angles different mixtures H2/CO2 with brine on mineral pressures temperatures, using tilted plate method. results show that angle increases pressure, leading system become less water-wet. Conversely, an increase temperature makes more Moreover, measured remains relatively constant despite changes concentration. Further analyses utilizing atomic force microscope (AFM) energy dispersive X-ray spectroscopy (EDS) indicated chemical physical structure rock does not change after exposure CO2, consistent observed lack varying fraction. conclusion, water-wet state identified decreases residual trapping H2, facilitating higher recovery but posing potential risk leakage. Hence, fraction favorable reducing decreasing IFT and, subsequently, column. This improves our understanding mechanisms, aiding accurate simulations underground systems.

Language: Английский

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Underground Hydrogen Storage: Transforming Subsurface Science into Sustainable Energy Solutions

Energies, Journal Year: 2025, Volume and Issue: 18(3), P. 748 - 748

Published: Feb. 6, 2025

As the global economy moves toward net-zero carbon emissions, large-scale energy storage becomes essential to tackle seasonal nature of renewable sources. Underground hydrogen (UHS) offers a feasible solution by allowing surplus be transformed into and stored in deep geological formations such as aquifers, salt caverns, or depleted reservoirs, making it available for use on demand. This study thoroughly evaluates UHS concepts, procedures, challenges. paper analyzes most recent breakthroughs technology identifies special conditions needed its successful application, including site selection guidelines, technical factors, significance characteristics. The integrity wells caprock, which is important safe efficient storage, can affected operating dynamics cycle, notably fluctuations pressure stress within formations. To evaluate potential broader adoption, we also examined economic elements cost-effectiveness practicality storage. We reviewed current efforts identified key knowledge gaps, primarily areas hydrogen–rock interactions, geochemistry, gas migration control, microbial activities, geomechanical stability. Resolving these technological challenges, regulatory frameworks, environmental sustainability are UHS’s long-term extensive integration industry. article provides roadmap research development, emphasizing need further fully realize technology’s promise pillar economy.

Language: Английский

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Pore-scale imaging of hydrogen displacement and trapping in porous media

International Journal of Hydrogen Energy, Journal Year: 2022, Volume and Issue: 48(8), P. 3091 - 3106

Published: Nov. 10, 2022

Hydrogen can act as an energy store to balance supply and demand in the renewable sector. storage subsurface porous media could deliver high capacities but volume of recoverable hydrogen is unknown. We imaged displacement capillary trapping by brine a Clashach sandstone core at 2–7 MPa pore fluid pressure using X-ray computed microtomography. saturation obtained during drainage numbers <10−7 was ∼50% independent pressure. recovery secondary imbibition number 2.4 × 10−6 systematically decreased with pressure, 80%, 78% 57% initial recovered 2, 5 7 MPa, respectively. Injection increasing up 9.4 increased recovery. Based on these results, we recommend more shallow, lower sites for future operations media.

Language: Английский

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