It is natural gas cooled to
roughly -267° F at normal air pressure. It is odourless, non-toxic,
non-corrosive and less dense than water.
Natural gas is the cleanest
burning fossil fuel. It produces less emissions and pollutants than either coal
or oil. As a liquid, LNG in not explosive LNG vapour will only explode if an
enclosed space. LNG vapour is only explosive if within the flammable range of
50%-15% when mixed with air.
Natural gas
is composed primarily of methane (typically, at least 90%), but may also contain
ethane, propane and heavier hydrocarbons. Small quantities of nitrogen, oxygen,
carbon dioxide, sulphur compounds, and water may also be found in "pipeline"
natural gas. The liquefaction process removes the oxygen, carbon dioxide,
sulphur compounds, and water. The process can also be designed to purify the LNG
to almost 100% methane.
