Diesel oil is introduced as follows:

Diesel oil is a light petroleum product, a mixture of complex hydrocarbons (about 10 ~ 22 carbon atoms), and a diesel fuel, which is mainly made from diesel fractions produced in the processes of crude oil distillation, catalytic cracking, thermal cracking, hydrocracking and petroleum coking.

It can also be made from shale oil processing and coal liquefaction, and can be divided into light diesel oil (boiling point range is about 180 ~ 370℃) and heavy diesel oil (boiling point range is about 350 ~ 4 10℃). Widely used in large vehicles, railway locomotives and ships.

The definition of diesel oil is introduced as follows:

The most important use of diesel oil is for diesel engines of vehicles and ships. Compared with gasoline engines, diesel engines have higher thermal efficiency and lower fuel consumption. Diesel energy consumption is low, so some small cars and even high-performance cars also switch to diesel.

2065438+071October 27 17 The list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Diesel oil and light fraction belong to three kinds of carcinogens.

The performance of diesel oil is introduced as follows:

It is mainly made from diesel fractions produced in the processes of crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, petroleum coking, etc., and needs refining and adding additives; It is made of crude oil, shale oil, etc. By direct distillation or pyrolysis. According to the different properties of crude oil, there are paraffin-based diesel oil, naphthenic-aromatic-based diesel oil and so on. The calorific value is 3.3×107j/l.

Liquid petroleum fraction with boiling point range and viscosity between kerosene and lubricating oil. Flammable and volatile, insoluble in water, soluble in organic solvents such as alcohol. It is a complex mixture with boiling points ranging from 180℃ to 370℃ and from 350℃ to 4 10℃. Liquid petroleum fraction with boiling point range and viscosity between kerosene and lubricating oil.

The main indexes are cetane number, viscosity and freezing point. The quality requirements for diesel oil are good combustion performance and fluidity. The higher the cetane number, the better. The cetane number of diesel oil made from annual crude oil can reach 68. The cetane number of light diesel oil used in high-speed diesel engine is 42? 55, low speed below 35.