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Common fuels
When the composition of a fuel is known, this method can be used to derive the stoichiometric air-fuel ratio. For the most common fuels, this, however, is not necessary because the ratios are known:
Gasoline: 14.7
Natural gas: 17.2
Propane: 15.5
Ethanol: 9
Methanol: 6.4
Diesel: 14.6
Wiki User
∙ 13y ago
The ideal air-fuel ratio for complete combustion of propane is 15:1 by mass, meaning 15 parts of air to 1 part of propane. This ensures that all the propane is oxidized completely to carbon dioxide and water, maximizing energy release and minimizing emissions. Deviations from this ratio can result in incomplete combustion and the formation of harmful byproducts.
Wiki User
∙ 14y agoThe theoretical air/fuel mixture for typical natural gas (1,000 btu/cu ft) is 9.5 cubic feet per cubic foot of natural gas. At standard pressure and temperature, this translates to about 14.2 lbs of air per pound of natural gas. These numbers are for a stoichiometric combustion and do NOT take into account excess air which, for natural gas is typically between 10% and 15%.
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What is the air to fuel ratio for LPG?
The ideal air to fuel ratio for LPG (liquefied petroleum gas) combustion is typically around 25:1 by mass. This means 25 parts of air to 1 part of LPG for complete combustion. Adjustments may be needed based on specific engine requirements to achieve optimal performance and efficiency.
What are the elements needed in the combustion reaction?
You need oxygen (O2) and some source of fuel. That source of fuel is usually, but not always, a hydrocarbon. For example the combustion of propane would be CH3CH2CH3 + O2 =>3CO2 + 4H2O.The complete combustion of a hydrocarbon will always result in CO2 and H2O.
What is the optimum ratio of air to ethyne for complete combustion?
The optimum ratio of air to ethyne for complete combustion is around 13.5:1. This ratio ensures that there is enough oxygen present to fully combust the ethyne to carbon dioxide and water. A higher or lower ratio can result in incomplete combustion and the formation of carbon monoxide or soot.
Why is stoichiometric combustion rare?
Stoichiometric combustion is rare because it requires the exact ratio of fuel and oxygen for complete combustion, which is difficult to achieve in practice due to various factors like mixing issues, temperature variations, and incomplete fuel oxidation. Deviations from the ideal stoichiometric ratio can result in incomplete combustion, leading to inefficiency and the formation of pollutants.
How does heat combustion of paraffin compare to heat combustion of propane?
The heat combustion of paraffin produces less heat energy compared to propane because propane has a higher energy content per unit mass. Propane releases more energy per carbon atom compared to paraffin during combustion, making it a more efficient fuel for heating. Additionally, propane burns cleaner with lower emissions compared to paraffin.
What is the air to fuel ratio for LPG?
The ideal air to fuel ratio for LPG (liquefied petroleum gas) combustion is typically around 25:1 by mass. This means 25 parts of air to 1 part of LPG for complete combustion. Adjustments may be needed based on specific engine requirements to achieve optimal performance and efficiency.
What color should the flame of propane be to show complete combustion?
The flame of propane should be blue in color to indicate complete combustion. A blue flame indicates that the fuel is burning efficiently and producing less soot and harmful byproducts compared to a yellow or orange flame.
How is the combustion of propane similar to cellular respiration?
If the combustion of propane isn't getting enough oxygen it is incomplete and it would be a smokey yellow flame. For humans we depend on chemical potential energy from plants and animals. Propane combustion and cellular respiration are different because propane combustion depends on oxygen to fuel it and humans depend on chemical potential energy to fuel themselves.
What are the elements needed in the combustion reaction?
You need oxygen (O2) and some source of fuel. That source of fuel is usually, but not always, a hydrocarbon. For example the combustion of propane would be CH3CH2CH3 + O2 =>3CO2 + 4H2O.The complete combustion of a hydrocarbon will always result in CO2 and H2O.
What is the optimum ratio of air to ethyne for complete combustion?
The optimum ratio of air to ethyne for complete combustion is around 13.5:1. This ratio ensures that there is enough oxygen present to fully combust the ethyne to carbon dioxide and water. A higher or lower ratio can result in incomplete combustion and the formation of carbon monoxide or soot.
Why is stoichiometric combustion rare?
Stoichiometric combustion is rare because it requires the exact ratio of fuel and oxygen for complete combustion, which is difficult to achieve in practice due to various factors like mixing issues, temperature variations, and incomplete fuel oxidation. Deviations from the ideal stoichiometric ratio can result in incomplete combustion, leading to inefficiency and the formation of pollutants.
How does heat combustion of paraffin compare to heat combustion of propane?
The heat combustion of paraffin produces less heat energy compared to propane because propane has a higher energy content per unit mass. Propane releases more energy per carbon atom compared to paraffin during combustion, making it a more efficient fuel for heating. Additionally, propane burns cleaner with lower emissions compared to paraffin.
What does a combustion controller maintain?
A combustion controller maintains the optimal air-fuel ratio in a combustion process to ensure efficient and safe operation of the system. It regulates the amount of fuel and air supplied to the combustion chamber to achieve complete combustion and desired results.
How can we reduce the combustion of fossil fuels?
You can change the air-to-fuel ratio to get less optimal combustion.
What is cutoff ratio?
Cutoff ratio is not the ratio of the volume of the cylinder at the end of combustion to the start of the combustion process in a diesel engine. actually cutoff ratio means point at which fuel injected for a period and fuel delivery is stopped at required instant -is called cutoff ratio.............
What substance's complete combustion produces carbon dioxide and water?
candle wax. The wax is a hydrocarbon (hydrogen+carbon) and as it burns, it rects with oxygen and hydrogen in the air. Hydrogen+hydrogen+oxygen=H2O (water) Carbon+oxygen+oxygen=CO2 (carbon dioxide) Other hydrocarbons include petrol, diesel, oil, propane etc
Is hydrocarbon paraffin or propane is better fuel?
I would have to say cyclopropane because of increased bond strain.
