Liquified petroleum gas

Liquified petroleum gas (LPG) - natural hydrocarbon fuel made up of propane and butane. It has a special advantage to compress into a liquid at high pressure and return to a gaseous state in the atmospheric pressure. This means that it can be easily and conveniently stored as a liquid and has a great advantage in comparison with natural gas, which can turn to liquid only at low temperatures. In addition, LPG is 250 times denser in liquid form rather than a mixture of gases - that is why so much fuel can be stored in a relatively small container, which in turn can be used almost anywhere. Under normal pressure, n-butane becomes liquid at minus 0.5 °C, and isobutane at minus 11.7 °C. Under normal conditions propane is liquidised at 2.0 MPa, or 20 atmospheres pressure. These gases, depending on the composition and the purpose of use, are divided into household and car gas.