What is Diesel Fuel's Chemical Formula?

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Discussion Overview

The discussion revolves around the chemical formula of diesel fuel, exploring its composition and characteristics. Participants address the complexity of diesel as a mixture of hydrocarbons and the factors influencing its formulation, including boiling points and regulatory changes.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Jesse inquires about the chemical formula of diesel fuel, expressing confusion over the term "hydrocarbon."
  • One participant explains that diesel fuel is categorized based on boiling points and references standards such as ASTM D-86 and D-2887, noting the complexity of its chemical mixture.
  • Another participant suggests that diesel does not have a single chemical formula due to its mixture nature and proposes identifying major ingredients to find their individual formulas.
  • A different participant mentions that diesel consists of hydrocarbons with boiling points around 160°C, providing examples of hydrocarbons in the range of C10H20 to C14H26, while cautioning that this information may not be entirely accurate.
  • One participant discusses the differences in gasoline grades, focusing on pressure ratios and knocking, which may not directly relate to diesel but highlights the complexity of fuel formulations.

Areas of Agreement / Disagreement

Participants generally agree that diesel fuel is a mixture of hydrocarbons and does not have a single chemical formula. However, there is no consensus on the specific components or their exact formulas, and the discussion remains unresolved regarding the precise characterization of diesel fuel.

Contextual Notes

Participants note the complexity of diesel fuel's composition and the influence of regulatory standards on its formulation. There are also references to specific boiling points and chemical structures, but these are not universally agreed upon.

Who May Find This Useful

This discussion may be useful for students studying chemistry, individuals interested in fuel composition, or those exploring the differences between types of fuels.

spitfire10001
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hello, my name is Jesse and I'm new to the forums. I'm in 10th grade chemistry and i have a question.

what is the chemical formula of diesel fuel? i searched it on google and found something about hydrocarbon and i have no idea what this is. please help
 
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The various grades of fuels are manufactured largely based upon their boiling points. A fraction boiling between one temperature and another will be given the name 'gasoline' or 'kerosene' or 'diesel'. For diesel fuel the standard boiling ranges are found in ASTM D-86 and D-2887. The chemistry of the mixture boiling in that range is complex and ever-changing. Recently, the sulfur content of diesel sold in america has been greatly reduced. There are Clean Diesel regulations that require lower amounts of a component known as 'polynuclear aromatic hydrocarbons' (PAH) as well.
 
I am in no way an expert on gasoline or diesel, but from my understanding both are a mixture of many different ingredients, so I don't know if there is necessarilly a single chemicle formula for either. One way to approach it would be to find some of the major ingredients that go into diesel, and find the chemicle formulas for those separate ingredients.
 
Petrol and diesel are both mixtures of hydrocarbons. Petrol consists mainly of C7H18 and C8H18 heptane and octane. Premium petrol that you can buy from garages/petrol stations contains higher percentage of octane; ocatne releases more energy during conbustion. Diesel is a mixture of hydrcarbons with boiling points around 160C the hydrocarbons around this area are about C10H20 - C14H26. Don't regard this as being 100% correct but it should help give a general idea.
 
The primary difference between the "grades" of gasoline is what pressure ratio they can handle without knocking. If you have a car that doesn't need it, there is no benefit to higher octane gas.
 

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