Noun
The act or operation of making or becoming liquid; especially, the conversion of a solid into a liquid by the sole agency of heat.
The state of being liquid.
The act, process, or method, of reducing a gas or vapor to a liquid by means of cold or pressure; as, the liquefaction of oxygen or hydrogen.
Source: Webster's dictionaryAs oil prices were increasing during the first half of 2009, the coal liquefaction projects in China were again boosted, and these projects are profitable with an oil barrel price of $40. citation China is the largest producer of coal in the world. Source: Internet
However, it would not be profitable to build pipelines or liquefaction plants for the relatively small quantities of methane extracted incidentally at individual oil production sites. Source: Internet
At temperatures just below the triple point, compression at constant temperature transforms water vapor first to solid and then to liquid (water ice has lower density than liquid water, so increasing pressure leads to a liquefaction ). Source: Internet
An overview of coal liquefaction and its future potential is available. citation Coal liquefaction methods involve carbon dioxide (CO 2 ) emissions in the conversion process. Source: Internet
For hatnote The melting point (or, rarely, liquefaction point) of a solid is the temperature at which it changes state from solid to liquid at atmospheric pressure. Source: Internet
Gas is turned into liquid at a liquefaction plant, and is returned to gas form at regasification plant at the terminal. Source: Internet