Stoichiometric Ratio in Combustion

Stoichiometric ratio refers to the chemically correct air-fuel ratio required for complete combustion. It is the ratio of air to fuel required for the chemical reaction to occur completely, without any excess fuel or air.

Stoichiometric ratio is an important concept in combustion. It is the basis for determining the air-fuel ratio required for maximum efficiency in a combustion process.

Chemically Correct Air-Fuel Ratio by Volume

The stoichiometric ratio is the chemically correct air-fuel ratio by volume. It is the ratio of air to fuel required for complete combustion of a given fuel mixture. The stoichiometric ratio varies depending on the fuel being used, but it is typically between 14.7:1 and 15.2:1 for gasoline.

In other words, the stoichiometric ratio is the amount of air required to completely burn one unit of fuel. For gasoline, the stoichiometric ratio is around 14.7 parts of air to one part of fuel by volume.

Importance of Stoichiometric Ratio

The stoichiometric ratio is important in combustion because it affects the efficiency of the process. If the air-fuel ratio is too lean, meaning there is not enough fuel to burn all of the available oxygen, the combustion process will be incomplete. This can result in wasted fuel, reduced power output, and increased emissions.

On the other hand, if the air-fuel ratio is too rich, meaning there is too much fuel for the available oxygen, the excess fuel will not be completely burned. This can also result in wasted fuel and increased emissions.

Therefore, it is important to maintain the stoichiometric ratio for maximum efficiency and minimum emissions in combustion processes.

Correct ans is a chemically correct air fuel ratio by mass used in si engine