Compressed hydrogen

Compressed hydrogen (CH₂, CGH₂ or CGH2) is the gaseous state of the element hydrogen kept under pressure. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for mobile hydrogen storage in hydrogen vehicles.^[1] It is used as a fuel gas.

Compressed Hydrogen

IUPAC	Compressed hydrogen
Other names	Hydrogen under pressure, CGH2, CGH2
UN number	1049, Class 2
IMO	1049, Class 2.1
DOT	1049, Class 2.1
ADR	1049, Class 2.1
IATA	1049, Class 2.1
WHMIS	A, B1
RTECS	MW8900000
PEL-OSHA	Simple asphyxiant
ACGIH TLV-TWA	Simple asphyxiant
Appearance	Colorless, odorless
LEL	4 %
UEL	75 %
Auto ignition	500 °C (932 °F)

Infrastructure

Compressed hydrogen is used in hydrogen pipeline transport and in compressed hydrogen tube trailer transport.

Hydrogen tube trailer

See also

• Combined cycle powered railway locomotive
• Cryo-adsorption
• Gas compressor
• Gasoline gallon equivalent
• Hydrogen compressor
• Hydrogen safety
• Liquid hydrogen
• Liquefaction of gases
• Metallic hydrogen
• Slush hydrogen
• Standard cubic foot
• Timeline of hydrogen technologies