Patent ID: 7078011
Filing Date: 2006-07-18
Classification: B01D,C01B,Y02C,Y02P

Abstract:
1. A method of storing and supplying a gaseous hydrogen product to a pipeline under a product purity specification, having a pre-specifed hydrogen purity and an impurity level of impurities comprising carbon dioxide and water vapor, said method comprising: compressing a hydrogen steam made up of gaseous hydrogen to form a compressed hydrogen stream; introducing the compressed hydrogen stream into a salt cavern for storage of the gaseous hydrogen; recovering a crude hydrogen stream from the salt cavern; purifying the crude hydrogen stream by sufficiently removing at least the carbon dioxide and the water vapor from the crude hydrogen stream to at least in part produce a hydrogen product steam having the impurity level of the carbon dioxide and water vapor at or below the product purity specification; and supplying the gaseous hydrogen product to the pipeline by introducing said hydrogen product stream into said pipeline.