Salt caves and other underground locales are viable storage solutions for hydrogen fuel, but hydrogen’s physiochemical properties necessitate advancements to current storage technologies.
To reach carbon emission reduction goals, many countries are looking to hydrogen fuels. Like carbon-based gases, these hydrogen fuels can be stored in high volumes and at low cost underground. However, storing hydrogen, with its small molecular size, is harder than traditional fuels.
Many potential locations exist for underground hydrogen storage (UHS), from abandoned mines to depleted gas and oil reservoirs. Salt caves are the leading storage solution, yet many challenges remain, including long-term leakage prevention and explosion risk mitigation.
Zhang et al. summarize the state of underground hydrogen storage (UHS) with a focus on…
