Methods for storing hydrogen in a salt cavern
First Claim
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1. A method for storing high purity hydrogen product in a salt cavern, the salt cavern containing walls characterized by a halite structure having a minimum purity of at least about 75% of sodium chloride, comprising:
- removing the high purity hydrogen product from a high purity hydrogen pipeline;
compressing the high purity hydrogen product to produce a compressed high purity hydrogen product comprising a purity of 99% or greater;
introducing the compressed high purity hydrogen product into the salt cavern to create a pressure between a predetermined lower limit and a predetermined upper limit within the salt cavern;
maintaining the pressure within the salt cavern between the predetermined lower limit and the predetermined upper limit, wherein fluid is introduced into the salt cavern to increase the pressure within the salt cavern to at least the predetermined lower limit but below the predetermined upper limit, wherein the predetermined lower limit is 0.2 psi per linear foot of cavern depth and the predetermined upper limit is 1.0 psi per linear foot of cavern depth, wherein the cavern depth is defined as the vertical distance spanning from a top-most portion to a bottom-most portion of the salt cavern; and
confining the high purity hydrogen product within the salt cavern.
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Abstract
A novel method for storing high purity hydrogen into a salt cavern is provided. Particularly, the storage process involves confining the high purity hydrogen at a certain pressure in a salt cavern without seepage or leakage of the stored hydrogen through the salt cavern walls. The pressure in the cavern is maintained during storage of the high purity hydrogen.
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Citations
8 Claims
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1. A method for storing high purity hydrogen product in a salt cavern, the salt cavern containing walls characterized by a halite structure having a minimum purity of at least about 75% of sodium chloride, comprising:
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removing the high purity hydrogen product from a high purity hydrogen pipeline; compressing the high purity hydrogen product to produce a compressed high purity hydrogen product comprising a purity of 99% or greater; introducing the compressed high purity hydrogen product into the salt cavern to create a pressure between a predetermined lower limit and a predetermined upper limit within the salt cavern; maintaining the pressure within the salt cavern between the predetermined lower limit and the predetermined upper limit, wherein fluid is introduced into the salt cavern to increase the pressure within the salt cavern to at least the predetermined lower limit but below the predetermined upper limit, wherein the predetermined lower limit is 0.2 psi per linear foot of cavern depth and the predetermined upper limit is 1.0 psi per linear foot of cavern depth, wherein the cavern depth is defined as the vertical distance spanning from a top-most portion to a bottom-most portion of the salt cavern; and confining the high purity hydrogen product within the salt cavern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification