Natural gas is mainly composed of methane (85%) and a small amount of ethane (9%), propane (3%), nitrogen (2%) and butane (1%). Mainly used as fuel, but also used as raw materials for the manufacture of acetaldehyde, acetylene, ammonia, carbon black, ethanol, formaldehyde, hydrocarbon fuel, hydrogenated oil, methanol, nitric acid, synthetic gas, vinyl chloride and other chemicals.
Gas is the gas produced by steam passing through hot coke. The main components are carbon monoxide and hydrogen, which release water and carbon dioxide after combustion, as well as trace amounts of CO2, HC and NOX. The combustion speed is 7.5 times that of gasoline, and the explosion resistance is good. According to foreign research and patent reports, the compression ratio can reach 12.5.
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When natural gas is cooled to about-162℃ under normal pressure, it changes from gas to liquid, which is called liquefied natural gas (LNG for short).
The main component of liquefied natural gas is methane, with a small amount of ethane, propane and nitrogen. Natural gas is further purified in the process of liquefaction, and the purity of methane is higher, which contains almost no carbon dioxide and sulfide, and is colorless, odorless and nontoxic.
Liquefied natural gas (LNG) has become a new industry in China, developing rapidly. Liquefied natural gas (LNG) technology is not only used to solve the transportation and storage problems, but also widely used in peak shaving devices using natural gas.
Because the origin of natural gas is often not in industrial areas or densely populated areas, it is necessary to solve the problems of transportation and storage. The main component of natural gas is methane, and its critical temperature is 190.58K, so it cannot be liquefied under pressure at room temperature. Natural gas liquefaction and storage technology has gradually become a major advanced technology.
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