LNG – Liquefied Natural Gas

LNG is natural gas that has been cooled down to the boiling point when it condenses to a liquid phase.

Basic characteristics:

1) Composition:
Typically, LNG shall have a methane content of more than 75% and a nitrogen content of less than 5%.

2) Boiling temperature:
It varies depending upon natural gas composition. Pure methane condenses at minus 161°C at atmospheric pressure.

3) Density:
The density depends on the composition of natural gas and normally ranges from 430 kg/m3 to 470 kg/m3.

4) Properties:
• Colorless
• Odorless
• Non-toxic
• Mixture natural gas/air is ignitable in concentration range from 5% to 15% by volume
• High purity – many impurities are removed during liquefaction

5) Evaporation rate:
Very small quantity of LNG generates large volume of gas. One volume of liquid produces approx. 600 volumes of gas. One normal cubic meter of natural gas is generated by approx. 1,7 liters of liquid.

Some tips how to use LNG

1) Transport of natural gas to longer distances or wherever no pipeline grid is settled.
2) Local satellite plants providing supply of natural gas for villages; industrial enterprises etc.
3) Re-fueling stations – LNG is used as a fuel for engines of transport means such as ships; trucks; buses and personnel cars. Re-fueling stations can serve both LNG and CNG vehicles.