More Information about LNG
Besides crude oil and coal, natural gas is a key fossil energy with steady growth and accelerated annual demand and production. Lower carbon levels of LNG offers innovative benefits to consumers, businesses and the environment. Approximately 240 million tones of LNG were produced worldwide in the year 2014.
Liquefied Natural Gas typically contains more 90% methane and small amounts of ethane, butane propane, nitrogen and other heavier alkane hydrocarbons. During the processing of the NLG, it is purified by removing any condensates such as oil, mud, water and other gases such as carbon dioxide, hydrogen sulfide and other impurities.
Natural gas is compressed at moderate pressure and condensed. The temperature required to condense natural gas depends on its precise composition, but it typically ranges from -1200C to 1700C (-184 to 2740F). Conversion of natural gas into NLG makes it easier to for shipping from origination to destination. 600 cubic feet of natural gas can be converted into a single cubic foot of LNG.
Because of the high energy content of LNG (45 MJ/kg or 19,350 BTU/lb to 50 MJ/kg or 21,500 BTU/lb), the total amount of energy needed is reduced and its suitable for consumer purposes such as steam recovery, heating and cooking in sectors like steel, paper and ceramic.
Liquefied Natural Gas achieves a higher reduction in volume than Compressed Natural Gas (CNG) so that the energy density of LNG is 2.4 times greater than that of CNG or about 60% of that of diesel. As such, LNG is able to be transported cost effectively over long distances where pipelines do not exist.