Rajan Wilcox
Diesel fuel is derived from crude oil, which is extracted from the ground through wells and offshore rigs. The process of fractional distillation of crude oil yields various petroleum products, including diesel fuel. The crude oil is heated, and the vapors are captured and condensed into different types of fuel. Diesel fuel is specifically designed for diesel engines, which are a type of internal combustion engine where fuel ignition occurs without a spark due to the compression of inlet air and subsequent fuel injection. While traditional diesel fuel is refined from petroleum, alternative sources such as biodiesel, biomass-to-liquid (BTL), and gas-to-liquid (GTL) diesel are also being developed and adopted.
| Characteristics | Values |
|---|---|
| Origin | Diesel fuel originated from German scientist and inventor Rudolf Diesel's experiments for his compression-ignition engine which he invented around 1892. |
| First diesel engine prototype | Designed for liquid fuels. Tested with crude oil, petrol, kerosene, illuminating gas, lamp oil, ligroin, coal tar creosote, paraffin oil, gasoline, and fuel oil. |
| Crude oil | Diesel fuel is derived from crude oil, which is extracted from the ground through wells and offshore rigs. |
| Refineries | Crude oil is sent to refineries, where it is turned into gasoline, diesel, kerosene, and other extracts. |
| Distillation process | The oil is heated and the vapors are captured in another tank to condense into a new liquid. The different vapors heat at varying temperatures and are caught in separate tanks, resulting in different types of fuel. |
| Most common type | A specific fractional distillate of petroleum fuel oil. |
| Alternatives | Biodiesel, biomass to liquid (BTL), gas to liquid (GTL) diesel, Fischer-Tropsch diesel, synthetic diesel, etc. |
| Standardization | In many countries, diesel fuel is standardized. For example, in the European Union, the standard for diesel fuel is EN 590. |
| Ultra-low-sulfur diesel (ULSD) | A diesel fuel with substantially lowered sulfur contents. As of 2016, almost all petroleum-based diesel fuel in the UK, mainland Europe, and North America is of this type. |
| U.S. consumption | U.S. petroleum refineries produce most of the diesel fuel consumed in the country. |
| U.S. imports | In 2022, the United States imported about 0.07 billion barrels (2.80 billion gallons) of ULSD, and about 72% of those imports were from Canada. |
| Transportation | Diesel fuel moves by pipeline from refineries and ports to terminals near major consuming areas. Barges, trains, and trucks are also used for transportation. |
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What You'll Learn
Diesel fuel is derived from crude oil
Diesel fuel, also known as diesel oil, heavy oil, or simply diesel, is derived from crude oil. Crude oil is extracted from the ground through wells and offshore rigs and sent to refineries to be turned into gasoline, diesel, kerosene, and other extracts.
The process of converting crude oil into diesel fuel is called fractional distillation. Crude oil is heated, and the vapors are captured in another tank to condense into a new liquid. Different vapors heat at varying temperatures and are caught in separate tanks, resulting in different types of fuel. This process continues as various distillates are captured and cooled. The first functional diesel engine, invented by Rudolf Diesel around 1892, was designed for liquid fuels. Diesel initially tested crude oil from Pechelbronn but soon replaced it with kerosene due to its viscosity.
The most common type of diesel fuel is a specific fractional distillate of petroleum fuel oil. However, alternatives that are not derived from petroleum, such as biodiesel, biomass-to-liquid (BTL), or gas-to-liquid (GTL) diesel, are becoming increasingly popular. These alternative fuels can be blended with traditional diesel or used alone in diesel engines without modification and typically have very low sulfur content.
Diesel fuel is a high-volume product of oil refineries and is standardized in many countries. For example, in the European Union, the standard for diesel fuel is EN 590, and ultra-low-sulfur diesel (ULSD) is commonly used in the United Kingdom, mainland Europe, and North America. In the United States, most diesel fuel is produced by refineries and transported through pipelines, barges, trains, and trucks to retail service stations and consumers.
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Oil extraction involves wells and offshore rigs
Oil extraction is a complex process that involves a combination of advanced technologies and careful planning to ensure safety and environmental protection. This process, which includes the use of wells and offshore rigs, is a critical step in the journey of diesel fuel from the ground to our vehicles.
Wells and offshore rigs are essential components in the extraction of crude oil, which serves as the foundation for diesel fuel production. The first step in this process involves leasing an area of the ocean, where fossil fuel companies employ methods such as seismic testing to locate pockets of oil and gas reserves beneath the seafloor. Once these reserves are identified, it's time to bring in the mobile offshore drilling units (MODUs), also known as oil rigs or platforms. These rigs can be fixed to the seafloor using cables, concrete, and anchors, or they may float on the surface, depending on factors like water depth and weather conditions.
The drilling process itself is intricate and precise. After assembling the drill rig, which can require 20 to 30 truckloads of equipment, the team drills a "surface hole" to a depth of 100 feet below the deepest known aquifer. This is done to protect precious water sources. A steel casing is then cemented in place, and rigorous tests are conducted to ensure its impermeability before proceeding. The next step involves drilling the "long hole" to a depth of about 1000 feet above the target area, and then directionally steering the drill horizontally to access the oil and gas reserves. This horizontal drilling technique reduces the impact on the land above and allows for the use of a single drill pad for multiple wells.
Once the well reaches its target depth, the drill pipe is removed, and a steel pipe is inserted and cemented in place, creating the "well casing." Before commencing production, a perforating gun is lowered into the ground and fired into the rock layer, creating holes that connect the oil and gas reserves to the wellhead. Specialized instruments monitor pressure and real-time data as fracking fluid, primarily composed of water and sand, is pumped at high pressure to fracture the rock and release the trapped oil and gas.
The extracted oil and gas are then pulled from the wells to production platforms, where they are stored and processed before being transported to the coast via pipelines. These offshore rigs are designed to withstand hurricanes and must adhere to regulations aimed at preventing pollution, spills, and significant environmental changes. When a well reaches the end of its productive life, it is sealed and abandoned according to applicable regulations, and the land is restored to its previous state, leaving no trace of the well's existence.
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Oil refineries produce diesel
The first oil refinery was built in 1851 in Scotland and used primarily to extract paraffin for oil lamps. Kerosene was a common by-product that replaced paraffin. Diesel was also a common by-product but was frequently discarded because there was no use for it at the time. It wasn't until 1894 that Rudolph Diesel invented the first engine that could use it.
Diesel fuel is a high-volume product of oil refineries. In many countries, diesel fuel is standardised. For example, in the European Union, the standard for diesel fuel is EN 590. Ultra-low-sulfur diesel (ULSD) is a type of diesel fuel with substantially lowered sulfur content. As of 2016, almost all of the petroleum-based diesel fuel available in the United Kingdom, mainland Europe, and North America is of the ULSD type.
In addition to traditional diesel fuel refined from petroleum, it is possible to produce synthetic diesel from natural gas, synthesis gas derived from coal, or biogas obtained from biomass. Biodiesel, a biofuel made from oily plants such as soybeans or oil palms, can also be blended with traditional diesel fuel or used alone in diesel engines without modification. These alternative diesel fuels have very low sulfur content.
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Rudolf Diesel invented the first engine that used diesel
Diesel's engine, known as the compression-ignition engine, was designed to utilise compression ignition instead of spark plugs, similar to gas engines. This design allowed for the use of biodiesel or petroleum-derived fuels. The engine was first tested in 1893, and Diesel successfully proved that fuel could be ignited without a spark. However, early tests were dangerous, and Diesel nearly lost his life when one of his engines exploded. He worked diligently to improve his engine model and ran his first successful test in 1897.
Diesel's engine was a commercial success due to its high efficiency and simple design. It was soon employed to power cars, trucks, boats, pipelines, electric and water plants, and in mining, factories, and oil fields. The diesel engine replaced the steam piston engine in many applications and became a very important power source. Even today's diesel engines are based on Diesel's original concept.
The diesel fuel that powers these engines is derived from crude oil, which is extracted from the ground through wells and offshore rigs. The crude oil is sent to refineries, where it is heated, and the vapors are captured and condensed into different types of fuels, including diesel. In many countries, diesel fuel is standardised to meet specific requirements and regulations. For example, in the United States, most diesel fuel is ultra-low-sulfur distillate (ULSD), while in the European Union, the standard is EN 590.
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Diesel engines don't ignite with a spark
Diesel fuel, also known as diesel oil, is a liquid fuel designed for use in a diesel engine. This type of internal combustion engine does not require a spark to ignite, unlike gasoline engines. Instead, diesel engines use compression to ignite the fuel. Rudolf Diesel, a German scientist, invented the compression-ignition engine in the late 1890s. Initially, Diesel's engine was designed to run on any fuel, but the prototypes were designed for liquid fuels. Diesel experimented with various fuels, including crude oil, kerosene, lamp oil, petrol, ligroin, coal tar creosote, paraffin oil, and gasoline. Eventually, diesel fuel, a distillate of petroleum fuel oil, became the standard.
The key difference between spark plugs and glow plugs lies in their functions. Spark plugs are used in gasoline engines to ignite the fuel-air mixture with a high-energy spark. In contrast, glow plugs in diesel engines preheat the air in the combustion chamber to aid in ignition, especially in cold weather. Spark plugs are relatively low-maintenance and easy to replace, making them a cost-effective option. On the other hand, glow plugs improve fuel efficiency by enhancing combustion efficiency through the vaporization of fuel.
The absence of spark plugs in diesel engines is due to the unique properties of diesel fuel. Diesel fuel can reach a high enough compression temperature to ignite without a spark. Additionally, diesel engines are designed to rely on compression for ignition, with engine components that can handle higher pressures. This compression ignition process results in improved thermal and operating efficiency, producing more torque and enhancing fuel economy.
The use of glow plugs in diesel engines is particularly advantageous in cold conditions. When a diesel engine is cold, the glow plug assists in heating the atomized fuel mist, ensuring smoother operation. This feature contributes to the overall efficiency and performance of diesel engines, making them a preferred choice for utility vehicles and work trucks that require high torque and better fuel efficiency.
While diesel engines offer certain benefits, it is important to consider their environmental impact. Diesel exhaust, especially from older engines, can cause health issues. Additionally, diesel fuel contributes to emissions, and efforts have been made to reduce sulfur content, resulting in ultra-low-sulfur diesel (ULSD). Alternatives to petroleum-derived diesel, such as biodiesel and biomass-to-liquid (BTL) diesel, are also being developed to provide more sustainable options.
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Frequently asked questions
Diesel fuel, also known as diesel oil, heavy oil, or simply diesel, is a combustible liquid specifically designed for diesel engines.
Diesel fuel is derived from crude oil, which is extracted from the ground through wells and offshore rigs. The crude oil is sent to refineries, where it is turned into gasoline, diesel, kerosene, and other extracts.
The process is called fractional distillation. The oil is heated, and the vapors are captured in another tank to condense into a new liquid. The different vapors heat at varying temperatures and are caught in separate tanks, resulting in different types of fuel.
Most diesel fuel moves by pipeline from refineries and ports to terminals near major consuming areas. Barges, trains, and trucks are also used to transport diesel fuel to and from terminals and retail service stations.
Alternatives to diesel fuel derived from petroleum include biodiesel, biomass-to-liquid (BTL) diesel, gas-to-liquid (GTL) diesel, and synthetic diesel. These alternative fuels can be blended with traditional diesel or used alone in diesel engines.
