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System for operating a hydrogen storage salt cavern

  • US 10,173,840 B2
  • Filed: 10/27/2015
  • Issued: 01/08/2019
  • Est. Priority Date: 05/25/2012
  • Status: Active Grant
First Claim
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1. An underground hydrogen storage cavern formed by solution mining an underground salt formation to form a cavity defined by salt walls characterized by a halite structure having a minimum purity of at least about 75% of sodium chloride, the storage cavern salt walls confining the high purity hydrogen gas within the storage cavern under pressure conditions between 0.2 psi per linear foot of cavern depth and 1.0 psi per linear foot of cavern depth, said cavern exhibiting temperature excursions of less than 4°

  • F. for pressure losses of less than 1200 psig in the cavern by use of a brine pond reservoir operably connected to the salt cavern by a flow network through which brine from the brine pond reservoir is introduced into the salt cavern, and said brine is returned from the salt cavern to the brine pond reservoir to maintain the pressure conditions of the salt cavern between 0.4 psi per linear foot of cavern depth and 0.8 psi per linear foot of cavern depth.

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