No.92 gasoline has not been taken off the shelf, but some ethanol and additives have been added. The previous 92 # gasoline grade means that this grade gasoline has the same antiknock performance as the standard gasoline with 92% isooctane and 8% n-heptane, and the octane number is 92; The current ethanol gasoline for vehicles can be simply understood as adding 10% biofuel ethanol to the original gasoline.
With the rapid development of China's economy, the number of motor vehicles is also increasing rapidly. In order to cope with the increasingly severe energy crisis, relevant scientific research institutions are constantly trying to study new methods such as improving the combustion efficiency of gasoline and diesel, and alleviating the increasingly serious energy gap.
The development history of gasoline;
/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 built, and 1886 gasoline engine was successfully used as automobile power.
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. The subsequent catalytic cracking process further improved the gasoline yield and higher octane number than the thermal cracking process.
Baidu encyclopedia-gasoline