LNG

Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4) that has been converted to liquid form for ease of storage or transport. It takes up about 1600th the volume of natural gas in the gaseous state. It is odorless, colorless, non-toxic and non-corrosive. Hazards include flammability after vaporization into a gaseous state, freezing and asphyxia. The liquefaction process involves removal of certain components, such as dust, acid gases, helium, water, and heavy hydrocarbons, which could cause difficulty downstream. The natural gas is then condensed into a liquid at close to atmospheric pressure by cooling it to approximately �162 °C (�260 °F); maximum transport pressure is set at around 25 kPa (4 psi).
According to the Iran Petroleum Ministry, the proved natural gas reserves of Iran are about 1,046 trillion cubic feet (29.6 trillion cubic metres) or about 15.8% of world�s total reserves, of which 33% are as associated gas and 67% is in non associated gas fields. It has the world�s second largest reserves after Russia. As it takes approximately 5,850 cubic feet (166 m3) of gas to equal the energy content of 1-barrel (0.16 m3) of oil, Iran�s gas reserves represent the equivalent of about 216 billion barrels (3.43�1010 m3) of oil.