Katerina Swanson
Diesel fuel is a mixture of hydrocarbons derived from the distillation of crude oil. It has a higher boiling range than gasoline, typically between 160 °C and 371 °C, with some sources giving a broader range of 150-400 °C. This higher boiling point contributes to diesel's higher energy density and efficiency in compression-ignition engines. The boiling point of diesel fuel is an important factor in refining processes, aiding in the separation of different fractions during distillation.
| Characteristics | Values |
|---|---|
| Common Names | Diesel oil, heavy oil, DERV, distillate, gas oil, Solar, auto diesel, automotive diesel oil, diesel engine road vehicle |
| Origin | German scientist and inventor Rudolf Diesel's experiments for his compression-ignition engine |
| Composition | Complex mixture of aliphatic and aromatic hydrocarbons |
| Production | Derived from crude oil through fractional distillation |
| Boiling Point Range | 160°C to 371°C or 325°F to 675°F |
| Freezing Point | Petrodiesel: around -8.1°C (17.4°F); Biodiesel: 2°C to 15°C (36°F to 59°F) |
| Viscosity Increase | Noticeable as temperature decreases; turns into a gel at -19°C to -5°C (-2°F to 23°F) |
| Cetane Number | A measure of the delay of ignition; higher numbers indicate better ignition |
| Sulphur Content | Ultra-low-sulfur diesel (ULSD) has substantially lower sulfur content |
| Standardization | First standards introduced after World War II; EN 590 standard in Europe |
Explore related products
$34.99 $38.99
What You'll Learn
Diesel fuel's boiling point range
Diesel fuel is a mixture of hydrocarbons derived from the distillation of crude oil. It has a higher boiling point range than gasoline, typically falling between 160 °C and 371 °C. Some sources give a narrower range of 163–357 °C, while others state a range of 250 °C to 400 °C. This higher boiling point is advantageous for diesel engines as it results in higher energy density and improved ignition characteristics.
The boiling point range of diesel fuel is an important factor in its production and refining. Diesel fuel is separated from other petroleum products during distillation based on its boiling point. Optimising refining processes involves understanding the boiling points of the various fractions, allowing for the conversion of heavier fractions into lighter, higher-value products.
The specific boiling point range of diesel fuel is determined by its chemical composition, which can vary depending on the feedstock and refining processes used. The presence of certain compounds and additives can also influence the boiling point. For example, diesel fuel with a lower sulphur content, known as ultra-low-sulfur diesel (ULSD), is commonly used in the United Kingdom, mainland Europe, and North America due to its environmental and performance advantages.
The boiling point range of diesel fuel is also relevant to its performance and applications. Diesel fuel's higher boiling point compared to gasoline contributes to its energy density and efficiency in compression-ignition engines. Additionally, the boiling point affects the fuel's combustion properties, with diesel fuel's broader boiling range making it safer than petrol and unsuitable for spark-ignition engines.
In summary, the boiling point range of diesel fuel is a critical aspect of its production, characterisation, and performance. The specific range varies slightly depending on the source and the particular type of diesel fuel, but it generally falls between 160 °C and 371 °C. This higher boiling point range distinguishes diesel fuel from other petroleum products and contributes to its suitability for use in diesel engines.
Smaller Diesel Engines: Better Mileage Than Larger Horsepower?
You may want to see also
Explore related products
How diesel fuel is produced
Diesel fuel, also known as diesel oil, heavy oil, or simply diesel, is a liquid fuel designed for use in diesel engines. These engines are multifuel and can run on a wide range of fuels, but diesel fuel is specifically designed for high-performance, high-speed engines in cars and lorries. The most common type of diesel fuel is a fractional distillate of petroleum fuel oil, also known as petrodiesel. Diesel fuel is produced from various sources, including petroleum, biomass, animal fat, biogas, natural gas, and coal liquefaction.
Petroleum diesel is derived from crude oil, which is a naturally occurring liquid that can be refined into various fuels and other petroleum-based products. The refining process involves fractional distillation of crude oil between 200 and 350 °C at atmospheric pressure. This results in a mixture of carbon chains containing 9 to 25 carbon atoms per molecule. This fraction undergoes hydrodesulfurization to remove sulfur, which is an important step as sulfur in diesel fuel contributes to air pollution and is harmful to human health. The United States, for example, has implemented regulations to reduce the sulfur content of diesel fuel.
Another method of creating diesel fuel is by recombining shorter hydrocarbon chain distillates in specific proportions. This process results in a diesel fuel that is ready for blending with additives and then sale.
Synthetic diesel can also be produced from carbonaceous precursors, with natural gas being the most important source. Raw materials are converted into synthesis gas, which is then transformed into synthetic diesel through the Fischer-Tropsch process. This synthetic diesel is primarily composed of paraffins with low sulfur and aromatics content and is often blended into petroleum-derived diesel.
Biodiesel, an alternative to petroleum-derived diesel, is obtained from vegetable oil or animal fats (biolipids). These fats are typically fatty acid methyl esters (FAME) and undergo transesterification with methanol. Rapeseed oil (rapeseed methyl ester, RME) and soybean oil (soy methyl ester, SME) are commonly used oils for biodiesel production.
How Diesel Fuel Gelling Affects Your Engine
You may want to see also
Explore related products
Diesel fuel's viscosity
Diesel fuel is a liquid fuel designed for use in diesel engines, which are a type of internal combustion engine. The most common type of diesel fuel is a fractional distillate of petroleum fuel oil, but biodiesel, biomass-to-liquid (BTL), and gas-to-liquid (GTL) diesel are also used. Biodiesel is derived from renewable feedstocks such as used cooking oils, rapeseed oil, animal fat, or soybean oil. It is obtained through transesterification, and pure biodiesel is known as B100. Mixtures of biodiesel and petroleum diesel are named BXX, where XX is the percentage of biodiesel in the blend.
The viscosity of diesel fuel is an important parameter for its quality. The viscosity requirement of diesel fuel is typically specified at 40 °C. Diesel fuel becomes more viscous as temperatures decrease, which can be problematic in cold climates as the fuel can turn into a gel that cannot flow in fuel systems. This gel formation typically occurs at temperatures between −19 to −15 °C (−2 to 5 °F). To address this issue, special low-temperature diesel contains additives to keep the fuel liquid at lower temperatures.
Viscosity is critical in diesel fuel as it can impact the performance and integrity of the engine. If the fuel is too viscous, it can cause damage to the fuel pump due to higher pressure, leading to issues such as cam and follower wear. On the other hand, if the viscosity is too low, it may result in insufficient lubrication for the engine.
Viscosity also influences the fuel delivery rate and the atomization of the fuel during injection. Kerosene is often added to diesel fuel to modify its viscosity. Synthetic diesel, produced from natural gas through the Fischer-Tropsch process, is primarily composed of paraffins with low sulfur and aromatics content. This synthetic diesel is usually blended with petroleum-derived diesel to further adjust its viscosity.
Does Water and Diesel Mix?
You may want to see also
Explore related products
![Boiling Point [Blu-ray]](https://m.media-amazon.com/images/I/6152+mUagTL._AC_UY218_.jpg)
Diesel fuel's ignition characteristics
Diesel fuel, also known as diesel oil, heavy oil, or simply diesel, is any liquid fuel specifically designed for use in a diesel engine. Diesel engines are internal combustion engines in which ignition occurs without a spark, as a result of the compression of inlet air and the subsequent injection of fuel. This is why diesel fuel needs good compression ignition characteristics.
The diesel engine, named after its inventor Rudolf Diesel, was first designed for liquid fuels. Diesel fuel is standardised to ensure consistent quality, with measures such as cetane number, density, flash point, sulphur content, and biodiesel content. The cetane number is a key indicator of the diesel fuel's quality and ignition characteristics, representing the delay of ignition of the fuel. A higher cetane number indicates that the fuel ignites more easily when sprayed into hot compressed air. For example, European road diesel has a minimum cetane number of 51.
The compression required for ignition in a diesel engine is achieved by compressing pure atmospheric air to a degree that produces a temperature above the fuel's ignition point. The injected fuel is broken down into small droplets, which vaporise and mix with air. As the piston moves closer to the top dead centre, the mixture temperature reaches the fuel's ignition temperature, causing ignition.
Diesel engines differ from spark-ignition engines, such as petrol or gas engines, which use spark plugs to ignite the air-fuel mixture. Diesel engines can run on a variety of fuels, but their ignition characteristics may vary. For example, indirect injection engines generally perform better with fuels that have a high ignition delay, such as petrol. On the other hand, direct-injection engines can tolerate fuels with poor ignition delay characteristics and can operate on petrol.
Diesel Fuel Costs in Alaska: A Comprehensive Overview
You may want to see also
Explore related products
Diesel fuel's distillation process
Diesel fuel is a mixture of hydrocarbons obtained by the distillation of crude oil. It is a distillate fuel oil commonly used in motor vehicles with compression ignition engines. The process of distillation involves heating crude oil to a range of temperatures, typically between 200 and 350 °C, to separate the various components based on their boiling points.
The distillation process for diesel fuel typically occurs in a distillation tower or column, where crude oil feedstock is heated to different temperatures, resulting in the separation of various distillates. The longest hydrocarbon chains have boiling points over 400 °C, while shorter chains liquefy at lower temperatures. As the vapor rises in the tower, it cools, and different distillates are collected at different temperature ranges. Diesel fuel emerges when the vapor reaches temperatures between 200 and 350 °C. The distillation process extracts shorter hydrocarbon chains as the vapor rises, with the shortest chains exiting the top as vapour.
The primary distillation process typically occurs at atmospheric pressure, where the furnace temperature is set to maximise distillation without cracking the hydrocarbons. However, some refineries perform a second distillation under vacuum to further separate the heavier components. The distillates obtained from the primary distillation are then often blended with other streams from conversion refinery processes, such as cracking, to increase diesel fuel production and modify its viscosity.
The distillates that emerge from the distillation process are then further processed and upgraded to improve their quality and remove undesirable compounds. One common upgrading process is hydrotreating, which involves chemical reactions with hydrogen to reduce the content of sulfur, nitrogen, and other compounds. Other hydroprocessing methods can also be used, depending on the desired level of severity in removing these compounds.
The final diesel fuel product is a blend of the primary distillation streams and any conversion products. The diesel fuel specifications, including cetane number, fuel volatility, density, viscosity, and sulfur content, can vary for different fuel grades and countries. Diesel fuel used in road transportation, for example, must be a distillate fuel without any uncracked residuum fractions. The production of diesel fuel from crude oil is a complex process that involves careful control of temperatures and pressures to obtain the desired fuel characteristics.
Understanding Sulfur Content in Diesel Fuel
You may want to see also
Frequently asked questions
The boiling point of diesel fuel is somewhere between 150°C and 371°C.
Diesel fuel, also called diesel oil, heavy oil, or simply diesel, is a liquid fuel specifically designed for use in a diesel engine.
A diesel engine is a multifuel engine that runs on a variety of fuels. It is a type of internal combustion engine in which fuel ignition takes place without a spark as a result of the compression of inlet air and then the injection of fuel.
Diesel fuel contains more non-volatile components than gasoline. It has a higher boiling range, which gives it a higher energy density and improved ignition characteristics.
