Underground hydrogen storage in the gas reservoirs of Pennsylvania

Hydrogen will be crucial for powering energy hubs like Pennsylvania in the future. Here, we provide the first geological hydrogen storage resource assessment for the Commonwealth. We validate existing methods for estimating the pore volume available for hydrogen storage in hydrocarbon gas pools using industry-reported data. We estimate that Pennsylvania gas pools can store 1979 TWh ( c . 59 Mt) of hydrogen working gas, which is ample storage potential for a hydrogen economy in the state. We evaluate the physical and chemical attributes of these pools to compare their efficacy for hydrogen storage. Fifty-three large, dry-gas, high-pressure, high-temperature pools in sedimentary units with favourable mineralogy and water chemistry could be particularly effective hydrogen storage sites. This work will help hydrogen development to proceed in a state that requires large quantities of energy storage and fuel in the future.