Article
Article
Liquefied natural gas (LNG)
Article By:
Economides, Michael J. Chemical Engineering Department, University of Houston, Houston, Texas.
Francis, Arthur W., Sr. Formerly, Union Carbide Corporation, Tarrytown, New York.
Last reviewed:June 2018
DOI:https://doi.org/10.1036/1097-8542.385900
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Natural gas, usually consisting primarily of methane, that has been processed into liquid form. It is increasingly used for transporting large quantities of natural gas across oceans with specially designed ships. The properties of LNG are those of liquid methane, slightly modified by minor constituents. Natural gas must be cooled to cryogenic temperatures to be liquefied and then stored in well-insulated containers. More than 17 m3 (600 ft3) of natural gas condense into 0.028 m3 (1 ft3) of liquid at about −161°C (−258°F). In this form, the gas can be conveniently stored and transported (see illustration). At the receiving end, LNG is revaporized and then compressed and put into the natural gas distribution system. See also: Cryogenics; Natural gas
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