Difference between natural and liquefied gas.

The process of converting the initial fuel, which is mined in the bowels of the earth, into a liquid, as well as its regasification, requires significant energy consumption. Therefore, the cost of producing liquefied gas per 1 cubic meter of ready-to-use fuel is, as a rule, noticeably higher than that which characterizes the production of conventional gas.

As for liquefied petroleum gases, they are most often represented by substances such as propane and butane. In their chemical and physical properties, they differ from methane: in particular, their liquefaction is possible without high temperatures. This allows you to refuel lighters with propane and butane, place them in cylinders - including those that function as fuel carriers in cars. These substances are rarely supplied to consumers via main pipelines, since they have a significantly higher production cost per 1 cubic meter than traditional natural gas in the form of methane.

Compressed natural gas is also commonly referred to as compressed. It is also represented by methane, but it turns into a liquid not by cooling, but under very high pressure. Such gas is stored in special accumulators under a pressure of about 200 bar. The considered type of fuel is most often used for refueling cars. It is considered to be significantly more profitable than hydrocarbon gases.

Comparison

The main difference between natural gas and liquefied gas (if we consider both in the narrow sense) is, first of all, that the first is in a gaseous state - with a temperature approximately corresponding the one that has the environment has a minimum pressure and is methane. The second can be a very strongly cooled liquid (if it is liquefied methane), compressed to a liquid state with a gas with different chemical properties (if it is propane and butane), or a substance converted into a liquid through strong compression (if we are talking about compressed gas extracted from the bowels land). Hence the difference in the methods of gas transportation, in the methods of its storage.

Traditional natural gas, as a rule, does not require additional processing before being delivered directly to the consumer - it is enough to ensure that it enters the pipe and then distribute the fuel. Liquefied gas, before being supplied to consumers, must be regasified or removed from the cylinder, turning it from a liquid into a standard state.

Having determined what is the difference between natural and liquefied gas, let us fix the conclusions in the table.

Table

Natural gas Liquid gas
What do they have in common?
Liquefied gas in the form of cooled methane and compressed gas is initially natural - before it is cryotreated or compressed, respectively, in order to bring it to a liquid state
What is the difference between them?
GaseousLiquid
MethaneCan be also propane and butane
Has a temperature and pressure, in general, corresponding to that characterizing the environmentHas a very low temperature, requires placement in special cryo-tanks (liquefied methane
Generally cheaperUsually more expensive
.