Rajan Wilcox
Diesel fuel is a common fuel used in both domestic and industrial settings. It is also used in diesel-engine generators to generate electricity. Diesel fuel is refined from crude oil at petroleum refineries. This process is called fractional distillation, and it is how we obtain internal combustion engine fuels such as petrol and diesel. Diesel is a natural residual product of gasoline production. However, diesel is not a byproduct of gasoline, despite the common perception that they are interrelated in how they are produced.
| Characteristics | Values |
|---|---|
| Is diesel a byproduct of gasoline? | No, diesel is not a byproduct of gasoline. However, it is a natural residual product of gasoline production. |
| Is gasoline a byproduct of diesel production? | No, gasoline is not a byproduct of diesel production. However, if we didn't have a use for gasoline, and only burned diesel, gasoline would be considered a waste product of refining diesel oil. |
| How are diesel and gasoline related? | Diesel and gasoline are related due to their common source—crude oil. |
| How is diesel obtained? | Diesel is obtained from the fractional distillation of crude oil. |
| How is gasoline obtained? | Gasoline is obtained from the fractional distillation of crude oil. |
| What is diesel fuel made from? | Diesel fuel is made from crude oil and vegetable seed oil. |
| What is gasoline fuel made from? | Gasoline fuel is made from crude oil. |
| What is diesel fuel used for? | Diesel fuel is used in diesel engines, such as those found in freight and delivery trucks, trains, buses, boats, farm vehicles, construction vehicles, military vehicles, some cars and light trucks, and diesel-engine generators. |
| What is gasoline fuel used for? | Gasoline fuel is used in internal combustion engines, such as those found in cars. |
| What are the differences between diesel and gasoline fuel? | Diesel fuel is more powerful and efficient than gasoline fuel. Diesel fuel has a higher energy density and does not need ethanol to increase efficiency. |
| What are the environmental impacts of diesel fuel? | Before 2006, diesel fuel sold in the United States contained high quantities of sulfur, which produced air pollution emissions harmful to human health. Since then, the U.S. Environmental Protection Agency has issued requirements to reduce the sulfur content of diesel fuel. |
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What You'll Learn
Diesel is not a byproduct of gasoline extraction
Diesel fuel is not a byproduct of gasoline extraction. While it is true that diesel and gasoline are related, this is due to their common source—crude oil—rather than one being a byproduct of the other.
Crude oil is separated into its constituent parts through a process called fractional distillation, which involves heating the oil until it vaporizes at different levels based on the boiling points of its various components. The lighter products, including gasoline, are less dense and are collected from the top of the tower, while the heavier products, such as diesel, are extracted from the bottom and undergo additional refining steps.
It is important to note that the various distillates occur at different incremental stages of the distillation process. Gasoline is obtained before diesel, and bunker fuel is obtained after diesel. This is similar to distilling alcohol from beer. Alcohol vaporizes at a lower temperature than water, allowing it to be separated and condensed into a pure product, leaving behind the water (spent beer). If the spent beer is further distilled, water is obtained as a distillate, leaving behind a heavier residue.
In the case of crude oil, the purpose of the refining process is to separate the base product into its constituent parts. Gasoline is lighter and more volatile than diesel, and you cannot obtain diesel without first going through the process of obtaining gasoline. However, this does not mean that diesel is a byproduct of gasoline extraction. If only diesel was refined, gasoline would be burned off in the refining process.
While diesel is not a byproduct of gasoline extraction, it is a natural residual product of gasoline production. After refining out the diesel, heavier by-products such as lubricating oils, waxes, bunker fuel, and bitumen are left. The oil industry extracts every possible product with commercial value from each barrel of crude oil, so nothing can truly be considered a "waste byproduct."
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Gasoline is a lighter product
Diesel fuel and gasoline (or petrol) are obtained from crude oil. Crude oil is separated into its constituent parts through fractional distillation. The various distillates occur at different incremental stages of the distillation process, based on their boiling points.
The first cars ran on ethanol, and gasoline was a cheaper alternative. Gasoline is dangerous because its vapors can suddenly burst into flames. Diesel, on the other hand, requires a wick to burn. Gasoline is a different type of carbon than diesel. Diesel has a higher energy density than gasoline, making it more powerful and efficient, especially in trucks and heavy machinery.
While diesel fuel is primarily derived from petroleum, biodiesel production has been increasing. Biodiesel is produced from vegetable seed oil, an idea that originated with Rudolf Diesel's original plans for his engine.
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Diesel is a natural residual product
Diesel fuel is a natural residual product of gasoline production. While diesel is not a byproduct of gasoline, it is a residual product of the process of refining crude oil. Crude oil is separated into its constituent parts through fractional distillation, which involves heating oil to different temperatures based on the boiling points of its various components. This process yields several products, including gasoline, diesel, lubricating oils, waxes, bunker fuel, bitumen, jet fuel, gas oil, and heating oil.
The distillation process separates the lighter and heavier products. Lighter products, such as gasoline, are less dense and are collected from the top of the tower. Heavier products, like diesel, are extracted from the bottom and undergo additional refining steps. Gasoline is lighter and more volatile than diesel, and it is obtained before diesel in the distillation process.
The relationship between diesel and gasoline can be better understood by considering their historical context. Before the development of internal combustion engines, gasoline was considered a waste product. It was even burned off and disposed of due to economic factors, as the market at the time did not justify the cost of building the necessary infrastructure for its utilization.
However, with the advent of internal combustion engines, gasoline became valuable as a fuel source. Diesel, on the other hand, was originally intended to be vegetable seed oil, as envisioned by Rudolf Diesel for his engine. This concept eventually contributed to the production and use of biodiesel, which has seen significant growth in the United States, with an increase of 163 million gallons in production as of August 2020.
In summary, diesel is a natural residual product of the process of refining crude oil, which also yields gasoline. The two fuels have distinct characteristics, with diesel being more powerful and efficient, particularly in trucks and heavy machinery. The perception of diesel and gasoline as interrelated is due to their common source, and the specific products obtained from the refining process depend on the different hydrocarbons contained in the base product, which is crude oil.
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Gasoline is more refined than diesel
While diesel fuel is a byproduct of the production process, it is not accurate to say that it is a byproduct of gasoline production. Gasoline and diesel are derived from different components of crude oil. Gasoline is a lighter product that is collected from the top of the tower during the distillation process, while diesel is a heavier product that requires additional refining steps.
During the distillation process, crude oil is heated, causing it to vaporize at different levels based on the boiling points of its various components. The lighter components, including gasoline, vaporize at lower temperatures and are collected from the top of the distillation column. Diesel, on the other hand, is a heavier product that requires further refining. It is not a byproduct of gasoline production but rather a separate product derived from the same source, crude oil.
Gasoline is indeed more refined than diesel. It undergoes a more extensive refining process to separate it from the heavier components of crude oil. This is because gasoline has a lower boiling point and vaporizes more easily than diesel. The refining process for gasoline involves heating and cracking the crude oil to separate the different components, which are then sorted in a tall distillation column.
The process of refining gasoline is more complex and energy-intensive than that of diesel. Gasoline has a higher energy expenditure per unit volume of oil refined, and the volume of diesel produced per unit volume of oil is nearly triple that of gasoline. However, this does not mean that diesel is a byproduct of gasoline production. Rather, it reflects the fact that diesel and gasoline are derived from different components of crude oil, with diesel being the heavier and more energy-dense product.
In summary, while diesel fuel is a byproduct of the crude oil refining process, it is not specifically a byproduct of gasoline production. Gasoline is more refined than diesel because it undergoes additional processing to separate it from the heavier components of crude oil. This distinction is important as it highlights the different properties and applications of gasoline and diesel as fuel sources.
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Diesel fuel is derived from petroleum
Diesel fuel, also known as diesel oil, heavy oil, or simply diesel, is a liquid fuel designed for use in a diesel engine. It is a fractional distillate of petroleum fuel oil, and its specifications differ across various fuel grades and countries. The most common type of diesel fuel is derived from petroleum, but alternatives that are not derived from petroleum, such as biodiesel, biomass-to-liquid (BTL) or gas-to-liquid (GTL) diesel, are also available.
The process of deriving diesel fuel from petroleum involves fractional distillation of crude oil, resulting in a mixture of aliphatic and aromatic hydrocarbons with a boiling point range of approximately 150-380°C. This range may vary slightly depending on the source, with some stating a range of 163-357°C or 150-380°C. The distillates heavier than kerosene, derived through atmospheric distillation of crude oil, are the gas oil streams used in diesel fuel production.
The beginnings of the petrochemical industry date back to the 1850s when the first oil refineries were built by Ignacy Łukasiewicz in Poland. The early refiners were left with quantities of petroleum by-products, which attracted the attention of Rudolf Diesel, the inventor of the compression-ignition reciprocating engine. Diesel recognised that liquid petroleum products might be better fuels than coal, and he redesigned his engine for operation with liquid fuels, resulting in a successful prototype in 1895.
Petroleum-derived diesel, sometimes called petrodiesel, is composed of about 75% saturates in the United States. Small amounts of sulfur, nitrogen, and oxygen (heteroatoms) are present in this type of diesel fuel. When heteroatoms are bound into molecular structures with carbon and hydrogen, the resulting compounds are characterised as non-hydrocarbons. Examples of non-hydrocarbon compounds found in diesel include dibenzothiophene (a sulfur compound) and carbazole (a nitrogen compound).
In conclusion, diesel fuel is primarily derived from petroleum through fractional distillation, resulting in a mixture of hydrocarbons with specific boiling point ranges. The development of the diesel engine and the availability of petroleum by-products played a significant role in the adoption of diesel fuel. While petroleum-derived diesel is the most common, alternative sources such as biodiesel and synthetic processes are also being explored.
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Frequently asked questions
No, diesel fuel is not a byproduct of gasoline production. Gasoline and diesel are obtained from the fractional distillation of crude oil. Gasoline is a lighter product and is collected from the top of the tower, whereas diesel is a heavier product that requires additional refining steps.
Diesel fuel is primarily made from crude oil, which is refined at petroleum refineries. On average, 11 to 12 gallons of diesel fuel can be produced from each 42-gallon barrel of crude oil.
Diesel fuel has a higher energy density than gasoline, with one gallon of diesel producing approximately 147,000 BTUs compared to 125,000 BTUs for a gallon of gasoline. Diesel fuel is also more efficient and does not require ethanol as an additive.
Diesel fuel is commonly used in freight and delivery trucks, trains, buses, boats, farm and construction vehicles, and some cars. It is also used in diesel-engine generators for electricity generation in remote areas and as a backup power supply in hospitals, industrial facilities, and electric utilities.
