Review of underground hydrogen storage: Concepts and challenges
Keywords:
Hydrogen storage, renewable energy, subsurface storageAbstract
The energy transition is the pathway to transform the global economy away from its current dependence on fossil fuels towards net zero carbon emissions. This requires the rapid and large-scale deployment of renewable energy. However, most renewables, such as wind and solar, are intermittent and hence generation and demand do not necessarily match. One way to overcome this problem is to use excess renewable power to generate hydrogen by electrolysis, which is used as an energy store, and then consumed in fuel cells, or burnt in generators and boilers on demand, much as is presently done with natural gas, but with zero emissions. Using hydrogen in this way necessitates large-scale storage: the most practical manner to do this is deep underground in salt caverns, or porous rock, as currently implemented for natural gas and carbon dioxide. This paper reviews the concepts, and challenges of underground hydrogen storage. As well as summarizing the state-of-the-art, with reference to current and proposed storage projects, suggestions are made for future work and gaps in our current understanding are highlighted. The role of hydrogen in the energy transition and storage methods are described in detail. Hydrogen flow and its fate in the subsurface are reviewed, emphasizing the unique challenges compared to other types of gas storage. In addition, site selection criteria are considered in the light of current field experience.
Document Type: Invited review
Cited as: Hematpur, H., Abdollahi, R., Rostami, S., Haghighi, M., Blunt, M. J. Review of underground hydrogen storage: Concepts and challenges. Advances in Geo-Energy Research, 2023, 7(2): 111-131. https://doi.org/10.46690/ager.2023.02.05
ReferencesAbe, J., Popoola, A., Ajenifuja, E., et al. Hydrogen energy, economy and storage: Review and recommendation. International Journal of Hydrogen Energy, 2019, 44(29): 15072-15086.
Al Shaqsi, A. Z., Sopian, K., Al-Hinai, A. Review of energy storage services, applications, limitations, and benefits. Energy Reports, 2020, 6(2020): 288-306.
Aziz, M. Liquid hydrogen: A review on liquefaction, storage, transportation, and safety. Energies, 2021, 14(18): 5917.
Bai, M., Song, K., Sun, Y., et al. An overview of hydrogen underground storage technology and prospects in China. Journal of Petroleum Science and Engineering, 2014, 124(1): 132-136.
Basso, O., Lascourreges, J. -F., Le Borgne, F., et al. Characterization by culture and molecular analysis of the microbial diversity of a deep subsurface gas storage aquifer. Research in Microbiology, 2009, 160 (2): 107-116.
Benson, S. M., Hingerl, F., Zuo, L., et al. Relative permeability for multi-phase flow in CO2 storage reservoirs. Part II: Resolving Fundamental Issues and Filling Data Gaps. Global CCS Institute, 2015.
Bihua, X., Bin, Y., Yongqing, W. Anti-corrosion cement for sour gas (H2S-CO2) storage and production of HTHP deep wells. Applied Geochemistry, 2018, 96(1): 155-163. BloombergNEF. The Hydrogen Economy Outlook. March 2020.
Blunt, M. J. Ostwald ripening and gravitational equilibrium: Implications for long-term subsurface gas storage. Physical Review E, 2022, 106(4): 45-103.
Boersheim, E. C., Reitenbach, V., Albrecht, D. Summary of an experimental investigation to evaluate potential technical integrity issues in porous UGS containing hydrogen. European Association of Geoscientists & Engineers, 2019, 2019(1): 1-3.
Boot-Handford, M. E., Abanades, J. C., Anthony, E. J., et al. Carbon capture and storage update. Energy & Environmental Science, 2014, 7(1): 130-189.
Boschee, P. Taking on the technical challenges of sour gas processing. Oil and Gas Facilities, 2014, 3(6): 21-25.
Böttcher, N., Görke, U. J., Kolditz, O., et al. Thermomechanical investigation of salt caverns for short-term hydrogen storage. Environmental Earth Sciences, 2017, 76(3): 98.
Burton, M., Kumar, N., Bryant, S. L. CO2 injectivity into brine aquifers: Why relative permeability matters as much as absolute permeability. Energy Procedia, 2009, 1(1): 3091-3098.
Caglayan, D. G., Weber, N., Heinrichs, H. U., et al. Technical potential of salt caverns for hydrogen storage in Europe. International Journal of Hydrogen Energy, 2020, 45(11): 6793-6805.
Chow, Y. T. F., Maitland, G. C., Trusler, J. P. M. Interfacial tensions of (H2O + H2) and (H2O + CO2 + H2) systems at temperatures of (298-448) K and pressures up to 45 Mpa. Fluid Phase Equilibria, 2018, 475(1): 37-44.
Cihlar, J., Mavins, D., Van Der Leun, K. Picturing the Value of Underground Gas Storage to the European Hydrogen System. Chicago, USA, Guidehouse, 2021.
Crotogino, F., Donadei, S., Bünger, U., et al. Large-Scale Hydrogen Underground Storage for Securing Future Energy Supplies. Paper Presented at 18th World Hydrogen Energy Conference 2010, Essen, Germany, 16-20 May, 2010.
De Chalendar, J. A., Garing, C., Benson, S. M. Pore-scale modeling of Ostwald ripening. Journal of Fluid Mechanics, 2018, 835(1): 363-392.
Deveci, M. Site selection for hydrogen underground storage using interval type-2 hesitant fuzzy sets. International Journal of Hydrogen Energy, 2018, 43(19): 9353-9368.
Diamond, L. W., Akinfiev, N. N. Solubility of CO2 in water from -1.5 to 100 ℃and from 0.1 to 100 MPa: Evaluation of literature data and thermodynamic modelling. Fluid Phase Equilibria, 2003, 208(1-2): 265-290.
Dopffel, N., Jansen, S., Gerritse, J. Microbial side effects of underground hydrogen storage-knowledge gaps, risks and opportunities for successful implementation. International Journal of Hydrogen Energy, 2021, 46(12): 8594-8606.
Ebigbo, A., Gregory, S. P. The relevance of microbial processes in geo-energy applications. Advances in Geo-Energy Research, 2019, 5(1): 5-7.
Ebrahimiyekta, A. Characterization of geochemical interactions and migration of hydrogen in sandstone sedimentary formations: Application to geological storage. PhD Dissertation, Université d’Orléans, France. 2017.
Elsaid, K., Sayed, E. T., Abdelkareem, M. A., et al. Environmental impact of desalination processes: Mitigation and control strategies. Science of the Total Environment, 2020, 740: 140125.
Enerdata. 2022 Edition: Annual benchmarks and long-term impacts, 2022.
Flesch, S., Pudlo, D., Albrecht, D., et al. Hydrogen underground storage—petrographic and petrophysical variations in reservoir sandstones from laboratory experiments under simulated reservoir conditions. International Journal of Hydrogen Energy, 2018, 43(45): 20822-20835.
Ganzer, L., Reitenbach, V., Pudlo, D., et al. The H2STORE project-experimental and numerical simulation approach to investigate processes in underground hydrogen reservoir storage. Paper SPE 164936 Presented at the 75th European Association of Geoscientists and Engineers Conference and Exhibition, London, UK, 10-13 June, 2013.
Gaol, C., Wegner, J., Ganzer, L., et al. Investigation of pore-scale mechanisms of microbial enhanced oil recovery MEOR using microfluidics application. Paper SPE 195553 Presented at the 81st European Association of Geoscientists and Engineers Conference and Exhibition, London, UK, 3-6 June, 2019.
Georgiadis, A., Maitland, G., Trusler, J. P. M., et al. Interfacial tension measurements of the (H2O + n-Decane + CO2) ternary system at elevated pressures and temperatures. Journal of Chemical Engineering Data, 2011, 56(12): 4900-4908.
Giovannini, S. 50 Shades of (Grey and Blue and Green) Hydrogen. Energy Cities, 2020.
Gregory, S., Barnett, M., Field, L., et al. Subsurface microbial hydrogen cycling: Natural occurrence and implications for industry. Microorganisms, 2019, 7(2): 53.
Groenenberg, R., Koornneef, J., Sijm, J., et al. Large-scale energy storage in salt caverns and depleted fields (LSES), Utrecht, TNO, 2020.
Ham, Y., Kantzas, A. Measurement of relative permeability of coal to gas and water. Paper SPE 166995 Presented at the SPE Unconventional Resources Conference and Exhibition-Asia Pacific, Brisbane, Australia, 11-13 November, 2013.
Hangx, S., Bakker, E., Bertier, P., et al. Chemical-mechanical coupling observed for depleted oil reservoirs subjected to long-term CO2-exposure-A case study of the Werkendam natural CO2 analogue field. Earth & Planetary Sciences Letters, 2015, 428(1): 230-242.
Hashemi, L., Blunt, M., Hajibeygi, H. Pore-Scale Modelling and sensitivity analyses of hydrogen-brine multiphase flow in geological porous media. Scientific Reports, 2021a, 11(1): 8348.
Hashemi, L., Glrerum, W., Farajzadeh, R., et al. Contact angle measurement for hydrogen/brine/sandstone system using captive-bubble method relevant for underground hydrogen storage. Advances in Water Resources, 2021b, 154: 103964.
Hassannayebi, N., Azizmohammadi, S., De Lucia, M., et al. Underground hydrogen storage: Application of geochemical modelling in a case study in the molasse basin, upper Austria. Environment Earth Science, 2019, 78: 177.
Hassanpouryouzband, A., Joonaki, E., Edlmann, K., et al. Thermodynamic and transport properties of hydrogen containing streams. Science Data, 2020, 7(1): 222.
Heinemann, N., Alcalde, J., Miocic, J. M., et al. Enabling large-scale hydrogen storage in porous media-the scientific challenges. Energy & Environmental Science, 2021, 14(2): 853-864.
Hemme, C., van Berk, W. Hydrogeochemical modeling to identify potential risks of underground hydrogen storage in depleted gas fields. Applied Sciences, 2018, 8(11): 2282.
Hoffmann, P. The basic element: The discovery of hydrogen, in The Forever Fuel, edited by Hoffmann, P., Routledge, New York, pp. 9-17, 2019.
Hussain, N., Abdelkareem, M. A., Alawadhi, H., et al. Two dimensional Cu based nanocomposite materials for direct urea fuel cell. International Journal of Hydrogen Energy, 2021, 46(8): 6051-6060.
HYPOS Project to Study Hydrogen Energy Storage in Caverns. Fuel Cells Bulletin, 2019, 2019(6): 10-11. HyPSTER to Demo H2 Storage in Salt Caverns. Fuel Cells Bulletin, 2021, 2021(2): 11-12.
Iglauer, S., Ali, M., Keshavarz, A. Hydrogen wettability of sandstone reservoirs: Implications for hydrogen geostorage. Geophysics Research Letters, 2021, 48(3): 20-34.
Inayat, A., Nassef, A. M., Rezk, H., et al. Fuzzy modeling and parameters optimization for the enhancement of biodiesel production from waste frying oil over montmorillonite clay K-30. Science of the Total Environment, 2019, 666(1): 821-827.
Iordache, I., Schitea, D., Gheorghe, A. V., et al. Hydrogen underground storage in romania, potential directions of development, stakeholders and general aspects. International Journal of Hydrogen Energy, 2014, 39(21): 11071-11081.
Jagger, J. Physiological effects of near-ultraviolet radiation on bacteria, in Photochemical and Photobiological Reviews, edited by K. Smith, Springer, New York, pp. 1-75, 1983.
Juez-Larré, J., van Gessel, S., Dalman, R., et al. Assessment of underground energy storage potential to support the energy transition in the Netherlands. First Break, 2019, 37(7): 57-66.
Kamel, A. A., Rezk, H., Abdelkareem, M. A. Enhancing the operation of fuel cell-photovoltaic-battery-supercapacitor renewable system through a hybrid energy management strategy. International Journal of Hydrogen Energy, 2021, 46(8): 6061-6075.
Kampman, N., Busch, A., Bertier, P., et al. Observational evidence confirms modelling of the long-term integrity of CO2-reservoir cap rocks. Nature Communications, 2016, 7: 12268.
Kashefi, K., Pereira, L., Chapoy, A., et al. Measurement and modelling of interfacial tension in methane/water and methane/brine systems at reservoir conditions. Fluid Phase Equilibria, 2016, 409(1): 301-311.
Kobina, M., Gil, S. Green hydrogen: A key investment for the energy transition. Getting Infrastructure Finance Right, 2022.
Kryachko, Y. Novel approaches to microbial enhancement of oil recovery. Journal of Biotechnology, 2018, 266(1): 118-123.
Laban, M. P. Hydrogen storage in salt caverns chemical modelling and analysis of large-scale hydrogen storage in underground salt caverns. PhD dissertation, Delft University of Technology, the Netherlands, 2020.
Lalanne, P., Byrne, P. Large-scale pumped thermal electricity storages-converting energy using shallow lined rock caverns, carbon dioxide and underground pumped-hydro. Applied Sciences, 2019, 9(19): 4150.
Lassin, A., Dymitrowska, M., Azaroual, M. Hydrogen solubility in pore water of partially saturated argillites: Application to callovo-oxfordian clayrock in the context of a nuclear waste geological disposal. Physics and Chemistry of the Earth, Parts A/B/C, 2011, 36 (17-18): 1721-1728.
Le Duigou, A., Bader, A. G., Lanoix, J. C., et al. Relevance and costs of large scale underground hydrogen storage in France. International Journal of Hydrogen Energy, 2017, 42(36): 2987-23003.
Lehtola, T., Zahedi, A. Solar energy and wind power supply supported by storage technology: A review. Sustainable Energy Technologies and Assessments, 2019, 35: 25-31.
Lemieux, A., Shkarupin, A., Sharp, K. Geologic feasibility of underground hydrogen storage in Canada. International Journal of Hydrogen Energy, 2020, 45(56): 32243-32259.
Lewandowska-Śmierzchalska, J., Tarkowski, R., Uliasz-Misiak, B. Screening and ranking framework for underground hydrogen storage site selection in Poland. International Journal of Hydrogen Energy, 2018, 43(9): 4401-4414.
Li, X., Fan, X. Effect of CO2 phase on contact angle in oil-wet and water-wet pores. International Journal of Greenhouse Gas Control, 2015, 36: 106-113.
Liebscher, A., Wackerl, J., Streibel, M. Geologic storage of hydrogen-fundamentals, processing, and projects, in Hydrogen Science and Engineering: Materials, Processes, Systems and Technology, edited by D. Stolten and B. Emonts, Wiley-VCH, Weinheim, pp. 629-658, 2016.
Liu, W., Li, Y., Yang, C., et al. Permeability characteristics of mudstone cap rock and interlayers in bedded salt formations and tightness assessment for underground gas storage caverns. Engineering Geology, 2015, 193: 212-223.
Londe, L. F. Four ways to store large quantities of hydrogen. Paper SPE 208178 Presented at the Abu Dhabi International Petroleum Exhibition & Conference, Abu Dhabi, 16-18 November, 2021.
Lord, A. S., Kobos, P. H., Borns, D. J. Geologic storage of hydrogen: Scaling up to meet city transportation demands. International Journal of Hydrogen Energy, 2014, 39(28): 15570-15582.
Luboń, K., Tarkowski, R. Numerical simulation of hydrogen injection and withdrawal to and from a deep aquifer in NW Poland. International Journal of Hydrogen Energy, 2020, 45 (3): 2068-2083.
Lux, K. H. Design of salt caverns for the storage of natural gas, crude oil and compressed air: Geomechanical aspects of construction, operation and abandonment. Geological Society London Special Publications, 2009, 313(1): 93-128.
Mahdi, D. S., Al-Khdheeawi, E. A., Yuan, Y., et al. Hydrogen underground storage efficiency in a heterogeneous sandstone reservoir. Advances in Geo-Energy Research, 2021, 5(4): 437-443.
Manceau, J. C., Ma, J., Li, R., et al. Two-phase flow properties of a sandstone rock for the CO2/water system: Coreflooding experiments, and focus on impacts of mineralogical changes. Journal of the American Water Resources Association, 2015, 51(1): 2885-2900.
Massoudi, R., King, A. D. Effect of pressure on the surface tension of water. Adsorption of low molecular weight gases on water at 25 deg. The Journal of Physical Chemistry, 1974, 78(22): 2262-2266.
Matos, C. R., Carneiro, J. F., Silva, P. P. Overview of largescale underground energy storage technologies for integration of renewable energies and criteria for reservoir identification. Journal of Energy Storage, 2019, 21(1): 241-258.
Muhammed, N. S., Haq, B., Al Shehri, D., et al. A review on underground hydrogen storage: Insight into geological sites, influencing factors and outlook. Energy Reports, 2022, 8(1): 461-499.
Nemati, B., Mapar, M., Davarazar, P., et al. A sustainable approach for site selection of underground hydrogen storage facilities using fuzzy-delphi methodology. Journal of Settlements and Spatial Planning, 2020, 6: 5-16.
Niaz, S., Manzoor, T., Pandith, A. H. Hydrogen storage: materials, methods and perspectives. Renewable and Sustainable Energy Reviews, 2015, 50: 457-469.
Olabi, A. G., Mahmoud, M., Soudan, B., et al. Geothermal based hybrid energy systems, toward eco-friendly energy approaches. Renewable Energy, 2020, 147: 2003-2012.
Ozarslan, A. Large-scale hydrogen energy storage in salt caverns. International Journal of Hydrogen Energy, 2012, 37(19): 14265-14277.
Panfilov, M. Underground and pipeline hydrogen storage, in Compendium of Hydrogen Energy, edited by R. B. Gupta, A. Basile, T. Nejat Veziroğlu, Woodhead Publishing, Cambridge, pp. 91-115, 2016.
Payler, S. J., Biddle, J. F., Sherwood Lollar, B., et al. An ionic limit to life in the deep subsurface. Frontiers in Microbiology, 2019, 10: 426.
Peng, H., Fan, J., Zhang, X., et al. Computed tomography analysis on cyclic fatigue and damage properties of rock salt under gas pressure. International Journal of Fatigue, 2020, 134: 105523.
Perez, A., Pérez, E., Dupraz, S., et al. Patagonia windhydrogen project: Underground storage and methanation. Paper Presented at the 21st World Hydrogen Energy Conference 2016, Zaragoza, Spain, 13-16 June, 2016.
Pfeiffer, W. T., Bauer, S. Subsurface porous media hydrogen storage-scenario development and simulation. Energy Procedia, 2015, 76: 565-572.
Pichler, M. Underground sun storage results and outlook. Paper Presented at the 81st European Association of Geoscientists and Engineers Conference and Exhibition, London, UK, 3-6 June, 2019.
Prinzhofer, A., Tahara Cissé, C. S., Diallo, A. B. Discovery of a large accumulation of natural hydrogen in bourakebougou (Mali). International Journal of Hydrogen Energy, 2018, 43(42): 19315-19326. Rahman, M. M., Oni, A. O., Gemechu, E., et al. Assessment of energy storage technologies: A review. Energy Conversion and Management, 2020, 223: 113295.
Reitenbach, V., Ganzer, L., Albrecht, D., et al. Influence of added hydrogen on underground gas storage: A review of key issues. Environmental Earth Sciences, 2015, 73(11): 6927-6937.
Reynolds, A. C., Krevor, S. Characterizing flow behavior for gas injection: Relative permeability of CO2-brine and N2-water in heterogeneous rocks. Journal of the American Water Resources Association, 2015, 51: 9464-9489.
Rezk, H., Alsaman, A. S., Al-Dhaifallah, M., et al. Identifying optimal operating conditions of solar-driven silica gel based adsorption desalination Cooling system via modern optimization. Solar Energy, 2019, 181: 475-489.
Rusman, N. A. A., Dahari, M. A review on the current progress of metal hydrides material for solid-state hydrogen storage applications. International Journal of Hydrogen Energy, 2016, 41(28): 12108-12126.
Sainz-Garcia, A., Abarca, E., Rubi, V., et al. Assessment of feasible strategies for seasonal underground hydrogen storage in a saline aquifer. International Journal of Hydrogen Energy, 2017, 42(26): 16657-16666.
Sarmadivaleh, M., Al-Yaseri, A. Z., Iglauer, S. Influence of temperature and pressure on quartz-water-CO2 contact angle and CO2-water interfacial tension. Journal of Colloid Interface Science, 2015, 441: 59-64.
Scafidi, J., Wilkinson, M., Gilfillan, S. M. V., et al. A quantitative assessment of the hydrogen storage capacity of the UK continental shelf. International Journal of Hydrogen Energy, 2021, 46 (12): 8629-8639.
Shi, Z., Jessen, K., Tsotsis, T. T. Impacts of the subsurface storage of natural gas and hydrogen mixtures. International Journal of Hydrogen Energy, 2020, 45(15): 8757-8773.
Slowinski, E. J., Gates, E. E., Waring, C. E. The effect of pressure on the surface tensions of liquids. Journal of Physical Chemistry, 1957, 61(6): 808-810.
Šmigáň, P., Greksák, M., Kozánková, J., et al. Methanogenic bacteria as a key factor involved in changes of town gas stored in an underground reservoir. FEMS Microbiology Ecology, 1990, 73(3): 221-224.
Sørensen, B. Underground hydrogen storage in geological formations, and comparison with other storage solutions. Paper Presented at the Hydrogen Power Theoretical and Engineering International Symposium VII, Merida, Mexico, January, 2007.
Soudan, B. Community-scale baseload generation from marine energy. Energy, 2019, 189: 116134. Stolten, D., Emonts, B. Hydrogen Science and Engineering: Materials, Processes, Systems and Technology. Weinheim, Germany, Wiley-VCH, 2016.
Taie, Z., Villaverde, G., Speaks Morris, J., et al. Hydrogen for heat: Using underground hydrogen storage for seasonal energy shifting in northern climates. International Journal of Hydrogen Energy, 2021, 46(5): 3365-3378.
Tarkowski, R. Underground hydrogen storage: Characteristics and prospects. Renewable and Sustainable Energy Reviews, 2019, 105: 86-94.
Tarkowski, R., Czapowski, G. Salt domes in Poland-potential sites for hydrogen storage in caverns. International Journal of Hydrogen Energy, 2018, 43(46): 21414-21427.
Thaysen, E. M., McMahon, S., Strobel, G. J., et al. Estimating microbial growth and hydrogen consumption in hydrogen storage in porous media. Renewable and Sustainable Energy Reviews, 2021, 151: 111481.
Toleukhanov, A., Panfilov, M., Kaltayev, A. Storage of hydrogenous gas mixture in geological formations: Selforganisation in presence of chemotaxis. International Journal of Hydrogen Energy, 2015, 40(46): 15952-15962.
Truche, L., Jodin-Caumon, M. C., Lerouge, C., et al. Sulphide mineral reactions in clay-rich rock induced by high hydrogen pressure. Application to disturbed or natural settings up to 250 _C and 30 bar. Chemical Geology, 2013, 351(1): 217-228.
Wan, J., Peng, T., Shen, R., et al. Numerical model and program development of TWH salt cavern construction for UGS. Journal of Petroleum Science and Engineering, 2019, 179: 930-940.
Wang, T., Yang, C., Ma, H., et al. Safety evaluation of gas storage caverns located close to a tectonic fault. Journal of Natural Gas Science and Engineering, 2015, 23: 281-293.
Wei, T. Y., Lim, K. L., Tseng, Y. S., et al. A review on the characterization of hydrogen in hydrogen storage materials. Renewable and Sustainable Energy Reviews, 2017, 79: 1122-1133.
W¨urdemann, H., Westphal, A., Kleyböcker, A., et al. St¨orungen des betriebs geothermischer anlagen durch mikrobielle stoffwechselprozesse und erfolg von gegenmaßnahmen. Grundwasser, 2016, 21(2): 93-106.
Yekta, A. E., Manceau, J. C., Gaboreau, S., et al. Determination of hydrogen-water relative permeability and capillary pressure in sandstone: Application to underground hydrogen injection in sedimentary formations. Transport in Porous Media, 2018, 122(2): 333-356.
Zapf, D., Staudtmeister, K., Rokahr, R. B., et al. Salt structure information system (InSpEE) as a supporting tool for evaluation of storage capacity of caverns for renewable energies-rock mechanical design for CAES and H2 storage caverns. Paper 2015209 Presented at the 49th US Rock Mechanics/Geomechanics Symposium, San Francisco, California, 29 June-1 July, 2015.
Zettlitzer, M., Moeller, F., Morozova, D., et al. Reestablishment of the proper injectivity of the CO2-injection well ktzi 201 in Ketzin, Germany. International Journal of Greenhouse Gas Control, 2010, 4(6): 952-959.
Zhan, L., Bo, Y., Lin, T., et al. Development and outlook of advanced nuclear energy technology. Energy Strategy Reviews, 2021, 34: 100630.
Zhang, N., Shi, X., Zhang, Y., et al. Tightness analysis of underground natural gas and oil storage caverns with limit pillar widths in bedded rock salt. IEEE Access, 2020, 8: 12130-12145.
Zivar, D., Kumar, S., Foroozesh, J. Underground hydrogen storage: A comprehensive review. International Journal of Hydrogen Energy, 2021, 46(45): 23436-23462.
