A source of gaseous hydrogen can be cooled to temperatures on the order of -250°C (-423°F).
This reduces the hydrogen to a liquid form which is high density and low pressure. This process requires compression refrigeration sources and heat exchangers to be properly configured.
About these documents
This website centralises publications on hydrogen, with a particular focus on technology and especially safety.
The publications are issued by industrial gases associations or standardisation bodies.
Depending on the issuing organisation, some publications may not be available for free download.