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Preparing for underground hydrogen storage

The leading and only independent cavern operator in northwest Europe is preparing for underground hydrogen storage
STORAG ETZEL was formerly a public enterprise under the name IVG. It was commissioned in 1971 to build an underground storage facility at Etzel, Germany, with a capacity of 10 million tonnes. This was to store crude oil as a national stockpile and to operate the aboveground facilities on behalf of the Federal Government.

Following privatisation in 1993, IVG acquired ownership of the cavern complex in 2005. In 2016, the long-established company was renamed Storag Etzel, and became largely independent.


In the early 1970s, after a thorough exploration of the underground, the Etzel salt dome with its mushroom-shaped structure was chosen for the project. The local salt dome is about 12 km long and 5 km wide and extends from a depth of more than 4,000 m to 750 m below the surface. Hardly anywhere else in Europe are the conditions so favourable ...

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