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Products of combustion of fuel depend on its composition and combustion conditions. However, the combustion of fuels in power plants, industrial furnaces, internal combustion engines and other plants are always produced water, C02 and CO. The relationship between C02 and CO in the combustion products depends on several factors and primarily on the ratio of fuel and air. If the air supply is insufficient, then the fuel burns incompletely, in the combustion products of the fraction of CO and soot, and the efficiency of fuel use is reduced. At the same time a large surplus of air affects the efficiency of the plants, as this requires additional costs of heat for heating the air. Low fuel-air mixture in some areas could fall below the ignition temperature of fuel, which is why part of it does not have time to burn. Therefore, the optimal ratio should be maintained between the fuel and air. It is best to control the ratio of C02 and CO content in combustion products.
In addition to water vapor and carbon oxides products of combustion of fuel containing sulfur and nitrogen oxides, nitrogen, unreacted oxygen and other substances. Sulfur oxides are formed by the reaction of sulfur oxidation.
. The main part of nitrogen oxides emitted into the atmosphere from vehicles and thermal power plants. Nitrogen oxides are formed by the oxidation of atmospheric nitrogen as well as nitrogen fuel. Reactions proceed by a chain mechanism.
The products of combustion of solid fuel and oil have a significant proportion of solids: Ash, soot, etc.
The number and composition of the products of combustion depend on the composition of the propellant and combustion conditions.