Gasoline is a volatile and flammable hydrocarbon mixture liquid fractionated and cracked from petroleum, which can be used as fuel. The appearance is transparent liquid, flammable, the distillation range is 30 ~ 220℃, and the main components are C5 ~ C 12 aliphatic hydrocarbons and cycloalkanes, and a certain amount of aromatic hydrocarbons. Gasoline has high octane number (anti-explosion combustion performance).
According to the octane number, it is divided into 89, 90, 92, 93, 95, 97 and 98 grades. From 20 12 to 65438+ 10, the number of gasoline 90, 93 and 97 was changed to 89, 92 and 95.
/kloc-in the 0/9th century, people didn't realize the importance of gasoline. At that time, kerosene was widely used for lighting. At that time, petroleum refining relied on a simple distillation process to separate components with different boiling points from petroleum. Kerosene has a high boiling point and is safe to use when igniting. It has become the main product of crude oil refining, while gasoline and other components are usually burned as fuel.
/kloc-in the middle and late 9th century, the internal combustion engine using gasoline was successfully manufactured, and 1886 gasoline engine was successfully used as the power of automobiles. Therefore, the importance of gasoline is increasing day by day. But only 20% gasoline can be extracted from crude oil by distillation.
19 1 1 year, in order to solve the problem of low gasoline yield, American Standard Oil Company adopted the thermal cracking process invented by William Burton and Robert Humphries to pyrolyze heavy gas oil into light gasoline and other fractions, which improved the gasoline yield as a whole. The thermal cracking process 19 13 was obtained in the United States.
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