Diesel

Gas oil and diesel are virtually the same, the minor difference that exists between these two is that often diesel contains lesser content of sulfur (in some countries; gas oil is diesel fuel but without the dyes which show it has had the road tax paid). Diesel oil is a type of Fuel oil. It is produced from the fractional distillation of crude oil between 200 °C and 350 °C at atmospheric pressure. Diesel is ultra-low sulfur that contains reduced amount of sulfur. It is a derivative of petroleum that is obtained by fractional distillation of crude oil with a boiling range of 250 ^oC (392 ^oF) and 350 ^oC (662 ^oF) at an atmospheric pressure, resulting in a mixture of carbon chains that typically contain between 8 and 21 carbon atoms per molecule with specific gravity range of 0.76–0.94. On the other hand, diesel fuel, at least as traditionally formulated, produces greater quantities of certain air pollutants such as sulfur and solid carbon particulates, and the extra refining steps and emission-control mechanisms put into place to reduce those emissions can act to reduce the price advantages of diesel over gasoline. In addition, diesel fuel emits more carbon dioxide per unit than gasoline, offsetting some of its efficiency benefits with its greenhouse gas emissions.

Diesel is easier to refine from petroleum than gasoline and its quality is measured by the numbers of cetane involve which usually falls into the range 30–60. A high cetane number indicates the potential for easy starting and smooth operation of the engine. The cetane number is the analog of the automobile engine octane number, with cetane (n-hexadecane, C16H34) having the arbitrarily assigned number of 100. At the other end of the scale, heptamethylnonane, an isomer of cetane, has the assigned cetane number of 0.

Diesel is primarily used for powering automobile, truck, bus and railway engines. The Automotive Gas Oil, or AGO, is the name given to fuel intended for use in road vehicles (trucks, buses, vans and cars) powered by diesel engines. It is also used in gas turbines and external combustion engine. We can offer clients automotive diesel fuel, which is covered in the European Union by standard EN 590 with a maximum of 10 ppm of sulfur. On the request of clients supply of other diesel fuel grades i.e. 50 ppm, 350 ppm for rail diesels, 500 ppm, 1000 ppm for marine fuels up to 10,000 ppm. Straight-chain hydrocarbons make the best diesel fuels. In order to have a standard reference scale, the oil is matched against blends of cetane (normal hexadecane) and alpha methylnaphthalene, the latter of which gives very poor engine performance. High-quality diesel fuels have cetane ratings of about 50, giving the same combustion characteristics as a 50-50 mixture of the standard fuels. The large, slower engines in ships and stationary power plants can tolerate even heavier diesel oils.