Diesel fuel (or diesel) is a mixture of several hydrocarbon materials. It is used in diesel engines that are common in freight transport vehicles and public transport. It is also used in electricity generators, and there are types of it used to power ship engines.

Biodiesel.
Diesel oil is extracted from petroleum oil by means of fractional distillation, and biofuels similar to diesel can be extracted from biomass by a method called biomass liquefaction. To distinguish between the two types, diesel extracted from crude oil may be called “petroleum diesel” or “petrodiesel”, unlike “biodiesel”. There is a type that contains a lower percentage of sulfur called “desulfurized diesel”. This type of diesel has become common in the world since 2007
The label
The name of diesel oil is attributed to the German Rudolf Diesel, inventor of the diesel engine. “Biodiesel” is also used to run engines using a diesel engine method, but it differs from petrodiesel in its chemical composition.

Assets
Diesel fuel arose from experiments by German scientist and inventor Rudolf Diesel of the ignition-compression engine that he invented in 1892. Diesel originally designed his engine to use coal dust as fuel, and he experimented with other fuels including vegetable oils, such as peanut oil, which he used to power engines. He exhibited at the Paris Exposition 1900 and the World’s Fair in 1911 also in Paris.
Species
Diesel fuel is produced from various sources, the most important of which is petroleum. Among the other sources: biomass, animal fats, biogas, natural gas, and liquefied coal.
Petroleum diesel
Petroleum diesel or fossil diesel is the most common type of diesel fuel. Produced from fractional distillation of crude oil at between 200 ° C (392 ° F) and 350 ° C (662 ° F) at atmospheric pressure, producing a mixture of carbon chains that typically contain between 9 and 25 carbon atoms per molecule.
Uses
Unlike gasoline and LPG engines, diesel engines do not use sparks with voltage, the diesel engine compresses the air inside the cylinder to high pressure and temperatures (compression ratios from 14: 1 to 18: 1 are common in today’s diesel engines); The engine generally pumps diesel fuel directly into the cylinder, starting a few degrees before the dead point and continuing through the combustion process. The high temperatures inside the cylinder cause the diesel fuel to react with the oxygen in the mixture (burning or oxidation) and to heat and expand the burning mixture to convert the thermal / pressure difference into a mechanical effort, that is, to move the piston. Engines have glow plugs and mesh heaters to help the engine start by preheating the cylinders to the lowest operating temperature. Diesel engines are poor-mix engines, as they burn more fuel in the air than is required for a chemical reaction, so they use less fuel compared to rich-spark ignition engines that use a federation component ratio of compressed air fuel (enough air to respond with the fuel).

Trucks
Diesel fuel is used widely in most types of transportation. Trucks and buses that were often gasoline in the 1920s and into the 1950s are now almost entirely diesel. The main exception is a gasoline-powered passenger car; Diesel cars are the fewest in the world.

Railway
Diesel replaced coal and petroleum fuels for steam powered vehicles in the latter half of the twentieth century, and is now used almost exclusively for the combustion engines of self-operating railroad vehicles (locomotives and railroad cars).

Military vehicles
Armored combat vehicles use diesel because of the lower risk of ignition and provides higher torque for engines, as well as reduces the likelihood of stopping and jamming.

Tractors and heavy equipment
Most of today’s tractors and heavy equipment are powered by diesel. Only small classes of tractors can work on gasoline engines. Diesel and heavy equipment conversion began to rely on diesel in Germany before World War II, but this was not common in the United States until after the war. During the 1950’s and 1960’s, this spread and developed in the United States of America. Diesel is commonly used in oil and gas extraction equipment, although some places use electrical or gas equipment to help reduce environmental impacts such as pollution from exhaust gases and liquid spills.