What is LNG and what are its key characteristics?
LNG stands for Liquefied Natural Gas. Natural gas is the same gas used in homes for cooking and heating. LNG is natural gas that has been changed into a liquid state by cooling it to e.g. -162°C (-260°F), at 1 barg pressure, through a refrigeration process at liquefaction plants. It is a cryogenic liquid that is odourless by nature, and is clear, non-corrosive and non-toxic. It is composed principally by methane, together with ethane, propane and other heavier hydrocarbons. When LNG is warmed up, it re-gasifies (transforms back into a gas).
Its key characteristics are:
- Comprises mainly methane, colourless, cryogenic liquid.
- Atmospheric boiling point of -163ºC to -160ºC.
- Density of 458-463 Kg/m3 (depending on composition).
- 1 m3 of LNG at atmospheric pressure equals 600 Sm3 of natural gas.