Katerina Swanson
Regular diesel fuel is made from a hydrocarbon mixture derived from petroleum, also known as crude oil. Diesel fuel is produced from various sources, with petroleum being the most common. Diesel fuel is generally simpler to refine from petroleum than gasoline. Diesel engines are also compatible with biodiesel, which is made from plant oils and animal fats, and synthetic diesel, which is made from non-petroleum sources such as natural gas, biomass, or coal.
| Characteristics | Values |
|---|---|
| Main source | Petroleum |
| Other sources | Natural gas, biomass, coal |
| Composition | Hydrocarbon mixture |
| Crude oil types | Paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons |
| Crude oil density types | Low density, high density |
| Crude oil refinement process | Distillation |
| Crude oil refinement location | Petroleum refineries |
| Crude oil refinement output | 11-12 gallons of diesel fuel from each 42-gallon barrel of crude oil |
| Contamination | Susceptible to microbial contamination |
| Contamination resolution | Regular testing, polishing |
| Environmental regulations | Ultra-low sulfur content limits, renewable fuel standards |
| Types | Biodiesel, synthetic diesel, ultra-low-sulfur diesel (ULSD) |
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What You'll Learn
Diesel fuel is refined from crude oil
Diesel fuel is typically derived from petroleum, a type of crude oil. It is generally simpler to refine diesel fuel from petroleum than gasoline. However, additional refining is often required to remove sulfur, which can contribute to higher costs. Petroleum refineries in the United States, for instance, produce an average of 11 to 12 gallons of diesel fuel from each 42-gallon barrel of crude oil.
Diesel fuel can also be produced from biomass-based sources, such as biodiesel, which is derived from animal fats and plant oils, and renewable diesel. These alternatives are considered cleaner and more environmentally friendly than diesel made from petroleum. In 2022, biomass-based diesel fuels contributed significantly to the overall diesel supply in the United States.
It is worth noting that synthetic diesel, also known as Fischer-Tropsch diesel or Gas-to-Liquids diesel, is a type of diesel fuel made from non-petroleum sources through chemical synthesis. Synthetic diesel can be produced from natural gas, biomass, or coal using complex chemical reactions. While it offers high purity and a consistent composition, its production cost is typically higher due to the complex processes involved.
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Crude oil has different densities
Crude oil, which is refined to make diesel fuel, has different densities. Crude oil can be observed in many forms, depending on its density. Low-density oils are thin and light-coloured, known as high-gravity crude oils. High-density oils, on the other hand, are very thick and viscous and appear similar to tar, making them low-gravity crude oils.
The different densities of crude oil are a result of the three major classes of hydrocarbons that compose it: paraffinic hydrocarbons, naphthenic hydrocarbons, and aromatic hydrocarbons. During the refinement process, the crude oil is distilled, and the resulting vapours condense and settle at different levels. This process yields various types of fuels, from heavy fuel oil to diesel and gasoline.
Diesel fuel, being thicker in density than gasoline, is more fuel-efficient. A diesel engine can generate the same amount of power as a gasoline engine but at a lower RPM, resulting in a lower rate of fuel combustion for the same output. Due to their higher compression ratio, diesel vehicles can achieve better fuel efficiency than gasoline vehicles.
The density of diesel fuel also contributes to its susceptibility to microbial contamination, which can degrade the fuel over time. Regular testing and polishing are necessary to maintain the desired quality and prevent potential damage to engines and equipment.
In summary, the different densities of crude oil give rise to various types of fuels through the distillation process. Diesel fuel's higher density compared to gasoline translates to better fuel efficiency and energy generation while consuming less fuel. However, diesel fuel's density also makes it prone to microbial contamination, requiring careful monitoring and maintenance.
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Diesel fuel is also made from biomass
Diesel fuel is a hydrocarbon mixture that is generally simpler to refine from petroleum than gasoline. The most common source of diesel fuel is petroleum, but diesel fuel is also made from biomass.
Biomass-based diesel fuels, also known as biodiesel and renewable diesel, are produced from organic lipid feedstocks that contain free fatty acids, such as vegetable oils, animal fats, or recycled grease. Biodiesel, often referred to as FAME biodiesel or FAME, is produced by a process known as transesterification, which converts organic fats and oils into fatty acid alkyl esters by reacting them with alcohols and catalysts. Methanol is typically used as the reactant to create fatty acid methyl esters. Renewable diesel is created from recently lived biomass and is chemically similar to petrodiesel.
Green diesel, also known as third-generation diesel, super-cetane diesel, renewable diesel, biocetano, and hydrotreated biodiesel, among other names, is a class of petrodiesel-like fuels obtained from biological sources (plant or animal-based feedstocks) that are not esters and hence differ from biodiesel chemically. Hydroprocessing is a well-established refinery technology that uses existing refinery equipment and infrastructure to convert non-edible seed oils, vegetable oils, waste cooking oil, and fats into usable liquid fuels.
Biomass-based diesel fuels are important for compliance with the U.S. Renewable Fuels (RFS) mandates and can reduce GHG emissions by 50% or more. These fuels can be produced by several technologies and processes, some of which are in commercial or pre-commercial production, while others are still in the research and development phase.
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Diesel fuel is a hydrocarbon mixture
Diesel fuel is also produced from biomass materials and is known as biodiesel. Biodiesel is a renewable fuel derived from animal fats and plant oils, and is considered a cleaner alternative to diesel made from petroleum. Biodiesel is compatible with almost all modern diesel engines, and bio-blends are also available for other engine applications. Synthetic diesel is another type of diesel fuel made from non-petroleum sources through chemical synthesis. Natural gas, biomass, or coal are used in a series of chemical reactions to produce synthetic diesel, which is known for its high purity and consistent composition.
In the United States, most diesel fuel is produced from crude oil at petroleum refineries. On average, 11 to 12 gallons of diesel fuel are produced from each 42-gallon barrel of crude oil. The United States also produces and consumes biomass-based diesel fuels, contributing to the supply of diesel fuel. In 2022, U.S. refineries produced about 1.75 billion barrels of ultra-low-sulfur distillate (ULSD), with a sulfur content of 15 parts per million or less.
Diesel fuel is generally simpler to refine from petroleum than gasoline. However, additional refining is required to remove sulfur, which can increase costs. Diesel fuel is used in various applications, including motor vehicles, heavy equipment, and generators. It offers better fuel efficiency and higher power output compared to gasoline, making it a popular choice for engines.
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Diesel fuel is more efficient than gasoline
Diesel fuel is made from hydrocarbons that are derived from petroleum. Crude oil, which can be observed in many forms depending on its density, is put through a refinement process called distillation to create diesel fuel. This process involves boiling the crude oil to create vapours, which then condense and settle at different levels. Diesel fuel is generally simpler to refine than gasoline, although additional refining is required to remove sulfur.
Diesel fuel has been an important contributor to industrial growth worldwide, enabling the development of mass transit systems, backup power solutions, and global import/export networks. Diesel engines are known for their high torque, fuel efficiency, and durability. They offer strong acceleration and engine longevity, making them ideal for heavy-duty tasks and long distances.
In contrast, gasoline engines offer more refined performance, quicker acceleration, smoother operation, and lower emissions, making them better suited for daily driving and lighter tasks. According to a study by The Motley Fool, diesel engines were found to be 29% more efficient on the highway and 24% more efficient in the city compared to gasoline engines. Diesel fuel packs more energy into every gallon, making it more economical overall.
However, it is important to note that diesel engines have a lower power-to-mass ratio, making them heavier and less suitable for aircraft. Additionally, diesel fuel is susceptible to microbial contamination, which can degrade the fuel and cause damage to engines if not caught early. The cost of diesel fuel has also been increasing, impacting the cost advantage of using diesel.
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Frequently asked questions
Regular diesel fuel is refined from crude oil and from biomass materials.
Crude oil is a dense, thick, and viscous hydrocarbon mixture that can be refined into various types of fuels.
Biomass-based diesel fuels (biodiesel and renewable diesel) are derived from animal fats and plant oils.
Petroleum is a common name for crude oil. It is the origin of most diesel fuel and other petroleum products.
Synthetic diesel, also known as Fischer-Tropsch diesel, is made from non-petroleum sources such as natural gas, biomass, or coal through a series of chemical reactions.
