IEA Clean Coal Centre | NOx emissions abatement and control by flue gas treatment

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NOx emissions abatement and control by flue gas treatment

Flue gas treatment for NOx control can be categorised into three areas:

The summarised descriptions of NOx control technologies are mainly drawn from the detailed IEA Coal Research review on NOx emissions abatement and control by Soud and Fukasawa (1996).

Air staging for NOx control (overfire air and two-stage combustion)

Bubbling fluidized bed combustion (BFBC) at atmospheric pressure

Burner optimisation for NOx control (excess air control, burner fine tuning)

Circulating fluidized bed combustion (CFBC) at atmospheric pressure

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Combined heat and power (CHP) - Cogeneration

Combined SO2/NOx removal processes

Cyclone fired wet bottom boilers

Dry scrubbers

Electrostatic precipitators (ESP)

Fabric filters (baghouses)

Flue gas desulfurization (FGD) for SO2 control

Flue gas recirculation for NOx control

Fluidised bed combustion (FBC)

Fuel staging (burner out of service (boos), fuel biasing, reburning, or three-stage combustion)

High Temperature High Pressure (HTHP) particulate control

Integrated gasification combined cycle (IGCC)

Low NOx burners

Mechanical/inertial collectors (cyclones/multicyclones)

NOx emissions abatement and control by flue gas treatment

NOx emissions abatement and control by primary measures

Particulate emissions control technologies

Pressurized Circulating Fluidized Bed Combustion (PCFBC)

Pressurized fluidized bed combustion (PFBC)

Pulverised coal combustion (PCC)

Regenerable processes for SO2 control

Selective catalytic reduction (SCR) for NOx control

Selective non-catalytic reduction (SNCR) for NOx control

Sorbent injection systems for SO2 control

Spray dry scrubbers for SO2 control

Stoker boilers

Wet scrubbers for particulate control

Wet scrubbers for SO2 control