Diesel is divided into vehicle diesel and special diesel.
Diesel diesel is also known as light diesel oil, mainly from the catalytic cracking of diesel fractions, there are some straight-run diesel fractions. Such as suitable cetane number, good low temperature fluidity and storage stability, and low ash content.
The main indicators of diesel are: flammability, evaporation, mobility, Biodiesel stability and corrosion and so on.
Diesel combustion of the level of a direct impact on the work of diesel engines. Cetane number is an important indicator of the ignition and combustion performance of diesel in the engine. The cetane number of the diesel fuel directly affects the combustion process of the fuel in the diesel engine.
Diesel oil has a high cetane number, its low ignition point, easy to spontaneously in the diesel engine cylinder, the engine works smoothly. If the cetane number of diesel is too low, fuel is difficult to burn, Biodiesel will produce abnormal combustion, reduce the power of the engine. But the cetane number of diesel should not be too high, if too high, diesel can not be completely burned, fuel consumption increased.
The cetane number of diesel is related to its chemical composition. More oil information oil information oil technology please pay attention to the public oil ring. The n-alkane has the highest cetane number, followed by the cycloalkane, and the polycyclic aromatic hydrocarbon has the lowest cetane number. Biodiesel Usually the cetane number of diesel fuel should be in the range of 45 ~ 60.
Special diesel is also known as heavy diesel oil, mainly used for fixed diesel generators, railways and ships and other large, low-speed diesel engine, heavy fractions, and even mixed with a certain amount of heavy oil, Biodiesel so the heavy fractions, Does not apply to car engines.
Diesel is a mixture of light petroleum products and complex hydrocarbons (about 10 to 22 carbon atoms). For diesel fuel. Mainly from the distillation of crude oil, catalytic cracking, thermal cracking, hydrocracking, petroleum coking and other processes produced by the deployment of diesel fractions; can also be shale oil processing and coal liquefaction system. Divided into light diesel oil (boiling range of about 180 ~ 370 ℃) and heavy diesel (boiling range of about 350 ~ 410 ℃) two categories. Widely used in large vehicles, railway locomotives, ships. The most important performance of diesel is fire and mobility.
Diesel oil Brief introduction A light petroleum product, for the compression ignition engine (ie diesel engine) fuel, is a complex hydrocarbon (carbon atoms of about 10 to 2 a light petroleum products for the compression ignition engine (ie diesel engine) fuel , Is a mixture of complex hydrocarbons (carbon atoms of about 10 to 22), Biodiesel mainly by the distillation of crude oil, catalytic cracking, thermal cracking, hydrocracking, Biodiesel petroleum coking and other processes produced by the deployment of diesel fractions (if necessary, refined (Boiling point range of about 180 ~ 370 ℃) and heavy diesel oil (boiling range of about 350 ~ 410 ℃) two categories.As the high-speed diesel engine (high temperature diesel engine) and high-speed diesel engine Fuel consumption (50 ~ 75g / MJ) is lower than the gasoline engine (75 ~ 100g / MJ), the use of diesel engines, the growing number of large means of delivery.
Diesel is widely used in large vehicles, railway locomotives, ships. The world's diesel fuel consumption growth rate is greater than gasoline, in 1985 China's diesel production and gasoline ratio of about 1.3. The most important thing about the performance requirements for diesel is fire and mobility. Boiling range and viscosity between the kerosene and lubricating oil between the liquid petroleum fractions. Is a complex mixture of components, boiling range of 180 ~ 370 ℃ and 350 ~ 410 ℃ two categories. From crude oil, shale oil, etc. by straightening or cracking process. Depending on the nature of the crude oil, there are paraffinic diesel oil, cycloalkyl diesel oil, naphthenic - aromatic hydrocarbon diesel oil and so on. According to the different density, the oil and its processed products, customary boiling point or boiling point range is called light, on the contrary become heavy.