There are proposals to store renewable hydrogen underground in geological formations similar to those used for storing natural gas. Has this been done successfully and are there technical challenges to storing hydrogen in this way that differ from those encountered when storing natural gas?

Geologic hydrogen storage is not new technology. There are several locations around the world that store hydrogen underground, predominantly in salt caverns, although there are other geologies believed to be suitable for large-scale storage. _________ See: Kobos,...

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...