What is Exhaust Gas?

Definition

Exhaust gas, also known as flue gas or stack gas, is the gas produced by combustion plants. It contains the reaction products of fuel, such as carbon dioxide, water vapor, nitrogen oxides, and sulfur oxides.

Sources

Exhaust gas is emitted from various sources, including:

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Power plants

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Industrial boilers

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Internal combustion engines (vehicles, generators)

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Residential heating systems

Composition

The composition of exhaust gas varies depending on the fuel used and the combustion process. Common components include:

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Carbon dioxide (CO2) *

Water vapor (H2O) *

Nitrogen oxides (NOx) *

Sulfur oxides (SOx) *

Particulate matter

Environmental Impact

Exhaust gas can have significant environmental impacts, including:

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Air pollution (smog, acid rain)

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Climate change (greenhouse gas emissions)

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Health hazards (respiratory and cardiovascular issues)