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CO₂ % in Flue Gas

Theoretical (dry) CO₂ concentration in flue gas as a function of excess air - useful cross-check against stack analyser.

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Formula, assumptions, and limits

CO2%=CO2,maxλCO_2\% = \frac{CO_2\text{,max}}{\lambda}
SymbolMeaningUnit
CO2,maxCO_{2,\text{max}}Stoichiometric CO₂ max% v/v
λλExcess air factor
CO2%CO_2\%Actual flue CO₂% v/v

Source: ASME PTC 4 - Fired Steam Generators

In short

Theoretical (dry) CO\u2082 concentration in flue gas as a function of excess air - useful cross-check against stack analyser.

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