Definition - What does Liquefaction mean?
Liquefaction is a process of material science in which a solid or gaseous matter is converted into liquid so that it can be transported easily from one place to another. Natural gas is converted into liquid form at a Liquefaction plant so that it can be loaded into liquefied natural gas tankers for transportation purposes. The temperature at which the natural gas remains in liquid form is called cryogenic temperature (-265 degrees Fahrenheit).
Petropedia explains Liquefaction
During the Liquefaction process, gas is initially compressed by a compressor so that it becomes highly pressurized. This high pressure gas is passed through a heat exchanger which cools the gas to a very low temperature and brings down its pressure. This low pressure gas now enters the compressor again to repeat the cycle. This process reduces the temperature of the gas to an extent that is converted to liquid form hence reducing its volume by a factor of approximately 600. Since its volume is reduced now, the liquefied natural gas (LNG) can be stored in the cryogenic tankers for economic transport over long distances. Gas Liquefaction is also known as gas refrigeration.