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A typical salt cavern can store 3,300 to 11,000 tons of hydrogen

Salt caverns can store between 3,300 and 11,000 tons of hydrogen.1 There is no defined ratio between space within a cavern and how much hydrogen can be stored, and storage capacity is ultimately determined by the permeability, structural integrity, and size of the salt formation. Large-scale energy storage projects often use multiple salt caverns located near each other, allowing for much greater storage capacity than a single cavern could offer.2

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Footnotes​

  1. Walsh, S. D., Easton, L., Wang, C., & Feitz, A. J. (2023). Evaluating the economic potential for geological hydrogen storage in Australia. Earth Science, Systems and Society, 3. https://doi.org/10.3389/esss.2023.10074 ↩

  2. Tackie-Otoo, B. N., & Haq, M. B. (2024). A comprehensive review on geo-storage of H2 in salt caverns: Prospect and research advances. Fuel, 356, 129609.. ↩