How can hydrogen be stored?

There are many options for hydrogen storage:

• As a gas in pressurized tanks.
• In lower pressure metal hydride tanks.
• As a cryogenic liquid in insulated tanks.
• In pipelines.
• Combined with other molecules to make other liquids and gases that can generally be less expensively transported (e.g., ammonia, methane, methanol, formic acid, various hydrocarbons).
• In underground natural gas storage fields.
• In underground salt caverns.

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