Liquefied natural gas (LNG), is natural gas that which is supercooled to around -162°C making it a cryogenic liquid. Depending on the composition, LNG has a density of around 430-480 kg/m³ and a calorific value of around 54-56 MJ/kg. It is easily transportable by means of tanker (having a typical capacity of around 19,000 kg), making it a very practical fuel in places where no real gas infrastructure exists.

LNG is typically stored in a large cryogenic vessel designed using the principles of a vacuum or Dewar flask. This storage vessel is super-insulated to help minimise the amount of boil-off into the atmosphere. At this point, the fuel can either be dispensed as LNG, or it can be vaporised into its gaseous state.

Typical applications of LNG include serving as a fuel depot, fuel for LNG vehicles, or once vaporised, used for industrial heaters or burners, or alternatively, domestic distribution.

Additional resources
» Liquefied natural gas (LNG) density calculator
» Natural gas gross (superior) calorific value calculator