Flue Gas and Combustion Analysis

Flue gas analysis is used for any fuel burning equipment, including engines and boilers, to indicate the air-fuel ratio and completeness of combustion and to measure the concentration and amount of all emission elements, including pollutants such as CO, CO2, NOx and SO2.

Carbon dioxide measurement in exhaust gas, for example, can be used to determine combustion efficiency. Optimum, or stoichiometrically correct, combustion results in the formation of the maximum amount of CO2 (about 12%) and the minimum amount of O2 and CO (0%). For the given example of pipeline quality gas, the stoichiometric CO2% volume basis is at maximum: 9.67% on wet flue and 11.88% on dry flue basis.

Several methods are used to measure flue gas composition. These include:

• O2 analyzers, which are commonly designed to measure

Note:

For complete uniform combustion, CX all points should lie along straight line drawn through pivot point.

Note:

For complete uniform combustion, CX all points should lie along straight line drawn through pivot point.

Reference

Maximum

Letter Fuel

% CO2 by Vol.

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