Types of Fuel: Definition, Properties, Advantage and Disadvantage

Fuel is any substance that can be transformed into usable work after undergoing chemical or nuclear changes to produce energy. A good fuel is one that is easily accessible. It is inexpensive and burns at a moderate rate in the air. It generates a significant quantity of heat and doesn't leave any undesirable substances behind. Fuel plays an integral role in a common man’s life in the form of a substance that is burned to provide nuclear energy, heat or power. Coal, wood, oil, or gas are some examples of fuel and Methanol, Gasoline, Diesel, Propane, Natural gas, Hydrogen are some types of fuel. Let’s discuss the topic in depth along with some important questions.

Read More: Properties of Matter

Keyterms: Fuel, Coal, Methanol, Gasoline, Diesel, Propane, Natural gas, Hydrogen, Wood, LPG, Kerosene, Petrol, Diesel, Natural gas, Biogas

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What is a Fuel?

Fuels are substances that are burned to provide heat energy. For example, wood, coal, LPG, kerosene, petrol, diesel, natural gas, and biogas, etc. Fuels can be generally classified into Renewable Sources of Energy and Non-Renewable Sources of Energy.

Renewable Sources of Energy

Renewable sources of energy are those that can be recovered from various biogeochemical cycles that occur in nature after they have been utilized. Running water energy is an example of a renewable source of energy because it can be renewed through the rain. Solar energy is another example. We should endeavor to make the most of renewable energy resources for long-term development.

Renewable Sources of Energy

Non-Renewable Sources of Energy

Non-renewable energy resources are sources of energy that, once exhausted, cannot be renewed by any biogeochemical cycle. Fossil fuels, for example, require millions of years to form and cannot be regenerated for our use, hence they are classified as non-renewable energy resources. Nonrenewable resources must be handled with caution, and all available potential energy sources must be considered before they are used.

Non-Renewable Sources of Energy

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Properties of Ideal Fuel

Some properties of Ideal Fuel are:

1. An ideal fuel is one that is easily accessible
2. A good fuel is one that is inexpensive.
3. An ideal fuel burns easily and at a moderate rate in the air.
4. It generates a lot of energy.
5. It should not leave behind any potentially dangerous compounds.
6. It should have no negative impact on the environment.

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Types of Fuels

Fuels can be generally classified into two factors:

1. On the basis of their fuels state:

• Solid Fuels
• Liquid Fuels
• Gaseous Fuels

2. On the basis of their occurrence:

• Natural Fuels
• Artificial Fuels

Solid Fuels

Solid Fuels are fuels that exist in their solid state at room temperature. They were the first type of fuel known to man, consisting primarily of wood used to make fire. Coal was another of man's most impactful fuels since it paved the path for the industrial revolution by powering everything from furnaces to steam engines.

Solid Fuels

Example:

• Wood
• Coal
• Biomass
• Petroleum
• Nuclear fuel
• Coke
• Cow dung cake
• Paraffin wax
• Uranium

Advantages:

• Easier to transport and store.
• Cost of manufacturing is low.
• Temperature of the ignition is moderate.

Disadvantage:

• A significant amount of energy is squandered.
• Handling is expensive, and managing it is difficult.
• The amount of ash in the mixture is high, and it burns with clinker production.

Liquid Fuel

Liquid fuels are fuels that exist solely in a liquid condition throughout their primary stage.

Liquid fuel

Example:

Advantages:

• Increased calorific value per unit mass.
• Burn without ash, clinkers, or other debris.
• It's a lot easier to keep the flames under control.
• Pipes make transportation easier, and they may be stored forever without losing quality.
• Energy loss is smaller in comparison.
• Combustion space in the furnace is reduced.

Disadvantages:

• Liquid fuel is substantially more expensive than solid fuel.
• Storage methods are more expensive.
• There is a higher risk of fire.
• For more efficient combustion, special burning apparatus is required.

Gaseous Fuels

Gaseous Fuels are fuels that exist only in a gaseous state throughout their primary stage. The majority of gaseous fuels are made up of hydrocarbons, carbon monoxide, hydrogen, or a combination of the three.

Gaseous Fuels

Example:

• Water Gas
• Producer Gas
• Coal Gas
• Natural gas
• Liquified petroleum gas (LPG)
• Compressed natural gas (CNG)
• Biogas or Gobar Gas

Advantages:

• Transportation via pipes is simple.
• It is really simple to start a fire.
• They have a higher heat content.
• After use, clean thoroughly.
• No specific burner technology is required.

Disadvantages:

• Large storage tanks are necessary.
• Because they are highly combustible, the risk of a fire is exceedingly great, and extra safety precautions must be taken.

The fuels are labeled primary and secondary fuels based the sources from where they are obtained.

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What are Fossil Fuels?

Fossil fuels are the decomposed remains of plants and animals that have been exposed to decades of pressure and heat beneath the earth's crust. Hydrocarbons are the most common component of fossil fuels. They are both practical and useful. They provide the necessary calorific value to meet our requirements. They are a non-renewable source of energy, despite the fact that they are plentiful right now. Fossil fuel combustion accounts for a significant portion of global pollution.

Fossil Fuels

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Types of Fossil Fuels

There are three types of fossil fuels.

• Coal
• Oil
• Natural Gas

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Nuclear Fuel

Nuclear fuel is any material that is used to produce nuclear energy. In terms of physics, any material can be made to emit nuclear energy. However, we choose materials that do not require extreme limits to release nuclear energy, based on their practicality and feasibility.

Heavy fissile materials capable of nuclear fission are found in most nuclear fuels. When these fuels are attacked by neutrons, they are capable of emitting neutrons as they disintegrate. This enables a self-sustaining chain reaction in a nuclear reactor to release energy at a controlled rate or at a very quick uncontrolled rate in a nuclear weapon.

Uranium-235 (²³⁵U) and Plutonium-239 (²³⁹Pu) are the most common examples of nuclear fuel.

Read More: Periodic Classification of Elements

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Things to Remember

• An ideal fuel is one that is inexpensive, readily available, flammable, and easy to transport. It has a high-calorie content. It does not emit any harmful gases or residues into the atmosphere.
• The efficiency and cost of various fuels vary.
• Fuel efficiency is measured in terms of calorific value, which is measured in kilojoules per kilogram.
• Carbon particles in the air that have not been burned are harmful pollutants that cause respiratory issues.
• Carbon monoxide gas is produced when a fuel is not completely burned.
• Global warming has been related to an increase in the concentration of carbon dioxide in the atmosphere.

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