Diesel Is A Light Oil Product
Diesel oil is the refinery of petroleum, from the bottom of the distillation column flow out of the liquid, is light oil, its volatility than kerosene low, ignition point than kerosene higher. According to the different condensate point and use, it is divided into light diesel oil, medium diesel oil and heavy diesel oil. Light diesel oil is mainly used as fuel for diesel engines, Biodiesel tractors and various high speed diesel engines. Diesel and heavy diesel are mainly used as fuel for various diesel engines, such as ships and power generation. The unit of measurement is thousand yuan.
Diesel is a mixture of light petroleum products and complex hydrocarbons (carbon atoms of about 10~22). For diesel fuel. Mainly from crude oil distillation, catalytic cracking, hot cracking, hydrocracking, petroleum coking process produced by the production of diesel distillate, can also be made from shale oil processing and coal liquefaction. Divided into light diesel oil (boiling point range of about 180~370℃) and heavy diesel (boiling range of about 350~410℃) two major categories. Widely used in large vehicles, railway locomotives, ship ships. Biodiesel The most important performance of diesel fuel is ignition and fluidity.
Diesel is widely used in large-scale vehicles, railway locomotives and ship ships. Diesel fuel consumption in the world is growing faster than petrol, and China's diesel production in 1985 is about 1.3 that of petrol. Biodiesel The most important requirement for diesel performance is ignition and mobility.
The diesel oil is classified by solidification point, such as 10,-20, indicating low use temperature, and diesel oil is widely used in large vehicles and ships. Mainly used as a diesel engine liquid fuel, because of the high speed Diesel engine (automotive) than the gasoline engine fuel, Biodiesel the demand for diesel oil growth is greater than gasoline, some small cars have switched to diesel.
The main index is 16 alkane value, viscosity, solidification point and so on. The quality requirements of diesel fuel are good for combustion performance and fluidity. The combustion performance of the 16-alkane value of the higher the better, the daqing crude oil made of 16 alkane value of up to 68. High-speed diesel engine with light diesel 16 alkane value of 42~55, Low-speed below 35.
Most of China's diesel oil from paraffin base crude oil (such as daqing crude oil), diesel oil in higher alkane content, so 16 of high value; The 16 alkane value of Daqing straight-run diesel oil is up to 68, but the diesel distillate obtained by FCC processing is 16 n below 40. The 16-alkane value of diesel can be improved by adding additives, and the commonly used additives are amyl nitrate or hexyl ester. Biodiesel The ignition of diesel oil can also be expressed by diesel index, which is calculated by the formula of aniline point and relative density of diesel oil. Another method for characterizing diesel ignition is the 16-alkane index, which is calculated by the relative density and 50% distillate temperature according to the prescribed formula.
The condensate point is also high when the content of paraffin in diesel oil is high and the boiling point is higher. The general use of diesel oil requires that the condensate point below the ambient temperature 3~5℃. Therefore, with seasonal and regional changes, different grades (different condensate points) can be used in the commercial diesel oil. In the actual use, the diesel at low temperature will precipitate crystals, crystal grow to a certain extent will plug the filter, then the temperature is called cold filter point. Compared with the condensate point, Biodiesel it can reflect the actual use performance. For the same oil, the general cold filtration point is higher than the 1~3℃. Low-condensation diesel oil can be obtained using dewaxing method
Characteristics of diesel Oil
Diesel is characterized by low spontaneous combustion temperature, so the diesel engine does not need spark plugs, such as ignition device, it uses compressed air to improve air temperature, so that the air temperature exceeds the ignition test of diesel fuel, then sprayed into diesel oil, Biodiesel diesel spray and air mixture at the same time to ignite their own combustion. In terms of performance, domestic traditional diesel engine has been given a heavy volume, vibration noise and emission pollution of the impression, so the basic use of domestic cars gasoline engines, but in recent years, foreign well-known car dealers began to introduce some of the latest diesel technology to China, greatly improved the Chinese diesel engine bias, For example, Biodiesel FAW Volkswagen has just launched the TDI diesel engine Bora, its environmental protection, power and smoothness are not inferior to the gasoline engine, but also has a unique diesel engine torque and ultra-low fuel consumption, the market prospects are very optimistic.