Applied Energy, Journal Year: 2024, Volume and Issue: 381, P. 125182 - 125182
Published: Dec. 24, 2024
Language: Английский
International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 52, P. 1537 - 1549
Published: Sept. 13, 2023
This study investigated the impact of cushion gas type and presence on performance underground hydrogen storage (UHS) in an offshore North Sea aquifer. Using numerical simulation, relationship between UHS was comprehensively evaluated, providing valuable insights for designing efficient project delivery. Results indicated that can significantly process's recovery efficiency purity. CO2 found to have highest capacity, while lighter gases like N2 CH4 exhibited better efficiency. Utilising as a lead higher 80%. It also determined utilising either these always more beneficial than alone, leading incremental up 7%. Additionally, purity degraded each cycle progressed, but improved over time. contributes understanding factors affecting inform selection optimal operational strategies.
Language: Английский
Citations
54
Fuel, Journal Year: 2024, Volume and Issue: 371, P. 131899 - 131899
Published: May 24, 2024
One of the major challenges in harnessing energy from renewable sources like wind and solar is their intermittent nature. Energy production these can vary based on weather conditions time day, making it essential to store surplus for later use when there a shortfall. storage systems play crucial role addressing this intermittency issue ensuring stable reliable supply. Green hydrogen, sourced renewables, emerges as promising solution meet rising demand sustainable energy, depletion fossil fuels environmental crises. In present study, underground hydrogen various geological formations (aquifers, depleted hydrocarbon reservoirs, salt caverns) examined, emphasizing need detailed analysis potential hazards. The paper discusses associated with storage, including requirement extensive studies understand interactions microorganisms. It underscores importance issue, focus reviewing past projects sites, well modeling field. also emphasizes incorporating hybrid into overcome limitations standalone systems. further explores future integrations green within dynamic landscape.
Language: Английский
Citations
25
Gas Science and Engineering, Journal Year: 2023, Volume and Issue: 121, P. 205196 - 205196
Published: Dec. 16, 2023
This review presents a State-of-Art of geochemical, geomechanical, and hydrodynamic modelling studies in the Underground Hydrogen Storage (UHS) domain. Geochemical assessed reactivity hydrogen respective fluctuations losses using kinetic reaction rates, rock mineralogy, brine salinity, integration redox reactions. Existing geomechanics offer an array coupled hydro-mechanical models, suggesting decline failure during withdrawal phase aquifers compared to injection phase. Hydrodynamic evaluations indicate critical importance relative permeability hysteresis determining UHS performance. Solubility diffusion gas appear have minimal impact on UHS. Injection production cushion deployment, reservoir heterogeneity however significantly affect performance, stressing need for thorough experimental studies. However, most current efforts focuses assessing aspects which are crucial understanding viability safety In contrast, lesser-explored geochemical geomechanical considerations point potential research gaps. Variety software tools such as CMG, Eclipse, COMSOL, PHREEQC evaluated those underlying effects, along with few recent application data-driven based Machine Learning (ML) techniques enhanced accuracy. identified several unresolved challenges modelling: pronounced lack expansive datasets, leading gap between model predictions their practical reliability; robust methodologies capable capturing natural subsurface while upscaling from precise laboratory data field-scale conditions; demanding intensive computational resources novel strategies enhance simulation efficiency; addressing geological uncertainties environments, that oil simulations could be adapted comprehensive offers synthesis prevailing approaches, challenges, gaps domain UHS, thus providing valuable reference document further efforts, facilitating informed advancements this towards realization sustainable energy solutions.
Language: Английский
Citations
37
Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 73, P. 108832 - 108832
Published: Aug. 31, 2023
In this study, we evaluate the technical viability of storing hydrogen in a deep UKCS aquifer formation through series numerical simulations utilising compositional simulator CMG-GEM. Effects various operational parameters such as injection and production rates, number length storage cycles, shut-in periods on performance underground (UHS) process are investigated study. Results indicate that higher H2 rates degrade both aquifer's working capacity recovery during withdrawal phase. This can be attributed to dominant viscous forces at which lead fingering gas gravity override native water resulting an unstable displacement by gas. Furthermore, analysis simulation results shows longer less frequent cycles decreased retrieval. We conclude UHS studied is technically feasible, however, thorough evaluation necessary optimise efficiency.
Language: Английский
Citations
31
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 60, P. 1192 - 1202
Published: Feb. 26, 2024
Subsurface porous rocks hold significant hydrogen (H2) storage potential to support an H2-based energy future. Understanding H2 flow and trapping in subsurface is crucial reliably evaluate their efficiency. In this work, we perform cyclic visualization experiments on a layered rock sample with varying pore throat sizes. During drainage, follows path consisting of large pores throats, through low permeability layer, substantially reducing capacity. Moreover, due the heterogeneity depending experimental strategy, imbibition unexpectedly results higher saturation compared drainage. These emphasize that small-scale heterogeneity, which often unaccounted for reservoir-scale models, plays vital role displacement media, implications efficient strategies.
Language: Английский
Citations
13
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 64, P. 896 - 905
Published: April 1, 2024
Language: Английский
Citations
8
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 70, P. 288 - 300
Published: May 17, 2024
Language: Английский
Citations
8
Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(16), P. 15834 - 15847
Published: Aug. 2, 2024
Underground porous formations provide significant storage capacity for H2 and CO2, making them a promising solution to aid energy needs mitigate CO2 emissions. The interfacial tension (IFT) of H2–brine within the underground formations, along with H2–H2O–rock wettability, is crucial factor in determining efficiency hydrogen (UHS). Cushion gas normally preinjected maintain reservoir pressure, prevent migration into rock matrix, control both injectivity productivity. Hereby, we examined influence CH4 as cushion gases at different temperatures, pressures, salinity conditions on IFT water–H2–rock wettability. We employed molecular dynamics (MD) simulations confronted our results against experimentally reported data literature. In addition, have assessed interfaces confined slit nanopore relevant calcite silica formations. Our reveal that brine–H2 interface not significantly sensitive pressure. However, increasing temperature reduced H2–brine, contrast increases IFT. (CH4 CO2) reduce when mixed hydrogen, having more pronounced effect than across all salinities. Such an impact due strong water–CO2 interactions compared water–CH4 water–H2 interactions. Both (CO2 CH4) could perturb surface hydrations maintaining zero-contact angle except low pH sandstone Calcite their water-wet state temperature, salinity. sandstone, predicted intermediate very good agreement experimental data. capillary pressure maps are built visualize wettability flow, mechanism, caprock sealing efficiency. pointed out be potential while (at acidic pH), using might lead loss matrix. Furthermore, investigation required confirm such these
Language: Английский
Citations
7
Energies, Journal Year: 2024, Volume and Issue: 17(6), P. 1268 - 1268
Published: March 7, 2024
Underground hydrogen storage in geological structures is considered appropriate for storing large amounts of hydrogen. Using the Konary structure deep saline aquifers, an analysis influence depth on was carried out. Hydrogen injection and withdrawal modeling performed using TOUGH2 software, assuming different depths. Changes relevant parameters operation underground facility, including amount H2 injected initial filling period, cushion gas, working average extracted water, are presented. The results showed that increasing to approximately 1500 m positively affects (flow rate hydrogen, total capacity, gas). Below this depth, trend reversed. gas-to-working gas ratio did not significantly change with depth. Its magnitude depends length period. An increase associated a greater water. Increasing duration period will reduce water production but volume.
Language: Английский
Citations
5
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 86, P. 261 - 274
Published: Aug. 30, 2024
Using high-resolution micro-CT imaging at 2.98 μm/voxel, we compared the percolation of hydrogen in gas injection with expansion for a hydrogen-brine system Bentheimer sandstone 1 MPa and 20 °C, representing storage an aquifer. We introduced dimensionless numbers to quantify contribution advection displacement. analysed 3D spatial distribution its displacement both cases demonstrated that injection, can only advance from connected cluster invasion-percolation type process, while expansion, access more pore space even disconnected clusters. The average saturation sample increased 30% 50% by estimated 10% expanded volume is attributed exsolution brine. This work emphasises importance studying combined effects pressure decline withdrawal assess influence on remobilising trapped gases. • High-resolution X-ray studied sandstone. Disconnected clusters expand reconnect during decline. Gas as declined. Hydrogen brine 10%. accessed larger pores than injection.
Language: Английский
Citations
5