Subterranean banded iron based injection fluid for hydrogen storage

Abstract

A method of hydrogen storage is described. The method includes injecting hydrogen into a subterranean banded iron formation, including magnetite, hematite, and/or pyrite, where the hydrogen is mainly hydrogen (H2) gas based on the total volume of the hydrogen. Further, the subterranean banded iron formation includes mainly magnetite, hematite, and/or pyrite based on a total weight of the subterranean banded iron formation, where the hydrogen is adsorbed on the magnetite, the hematite, and/or the pyrite. Further, the method includes injecting ethylenediaminetetraacetic acid into the subterranean banded iron formation to release the hydrogen from the magnetite, the hematite, and/or the pyrite.

Dependencies are inferred from the claim text.