Natural gas is a multi-component mixed gas, and there are few substances that can affect the health of human respiratory system during combustion. The carbon dioxide produced is only about 40% of that of coal, and the sulfur dioxide produced is also very small. Natural gas does not produce waste residue and waste water after combustion. Compared with coal, oil and other energy sources, it has the advantages of safe use, high calorific value and cleanliness.

Liquefied gas obtained from natural gas basically contains no olefins. Liquefied petroleum gas is mainly composed of hydrocarbons, and the main components are alkanes such as propane and butane.

Extended data:

Liquefied petroleum gas, like oil and natural gas, is a fossil fuel. Liquefied gas is a mixture of various low-boiling gases in the process of petroleum refining, and has no fixed components. The main components are butene, propylene, butane and propane. Although most energy enterprises do not specialize in producing liquefied petroleum gas, it contains a certain amount of output because it is a by-product of other fuel refining processes.

The relative density of liquefied petroleum gas refers to the mass ratio of liquefied petroleum gas to the same volume of air at the same temperature and pressure. A simple method to calculate the relative density of each component of liquefied petroleum gas is to use the ratio of the relative molecular mass of each component to the average relative molecular mass of air, because the volume of 1mol gas is the same in the standard state.

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