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Encyclopedia > Liquified natural gas

Liquified Natural Gas (LNG) is natural gas which has been artificially condensed into a liquid form by a combination of pressurisation and cryogenic cooling. Liquefaction greatly increases the density of the hydrocarbon allowing it to be stored and transported more efficiently.


Conditions required to condense natural gas depend on its precise composition and the process being used, but typically involve temperatures between −120 and −170 degrees Celsius and pressures of between 150 and 1000 kPa (20 and 150 PSI).


LNG offers an energy density comparable to petrol and diesel fuels, but its cost of production and the need to store it in expensive cryogenic tanks have prevented its widespread use in commercial applications.


Approximately 4% of the U.S. supply of natural gas is imported in the form of LNG.


  Results from FactBites:
 
Liquified natural gas conversion process - Patent 4761515 (3991 words)
Liquified Natural Gas (L.N.G.) is re-vaporized by heat exchange and pre-heated in a furnace at a temperature not exceeding 1100.degree.
LNG consumption is therefore seasonal, primarily in winter and the costly facilities required for liquefaction, storage and re-vaporization of LN are poorly utilized in summer.
The LNG feed stream (1) is re-vaporized in the heat exchangers (2) and (9), mixed with the recycle stream (8), and pre-heated in the furnace (4).
Natural Gas Facts - Factsheets (883 words)
Americans have demonstrated a preference for clean-burning natural gas because it is a versatile source of energy for heating and cooling their homes, cooking their meals and running appliances.
Natural gas is an attractive fuel because it is clean-burning and efficient.
Conservation and efficient natural gas use must be part of a national effort to balance natural gas supply and demand, especially in the short term.
  More results at FactBites »

 
 

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