Moreover, there is a special conversion formula between them, and the variable density needs to be introduced here. In gasoline, temperature has the greatest influence. Taking No.92 gasoline as an example, the density at room temperature is 0.725g/ml. According to the conversion formula, the mass of 1L92 gasoline is 0.725KG, that is, 0.725 kg.
In addition, at room temperature, the density of No.97 gasoline is 0.737g/ml, and the mass converted from 1L to No.97 gasoline is 0.737KG, that is, 0.737 kg. It can also be found that the higher the oil grade, the higher the density of gasoline, and the corresponding volume mass 1L is also slightly larger.
Development history
/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.
The subsequent catalytic cracking process further improved the gasoline yield and higher octane number than the thermal cracking process.