Selective Catalytic Reduction (SCR)

High NOx reduction rates and system reliability make our flexible and compact selective catalytic reduction technology the right choice for post-combustion NOx emissions control.

A wealth of experience

40 industrial references and more than 49 GW installed worldwide for power generation.

High reduction rate

Up to 95% NOx emissions removal, low ammonia slip (down to 2 ppm)—so you can meet NOx emissions standards and regulations.

Technology for performance

Proprietary IsoSwirl*mixing technology and specific ammonia injection grid design for improved performance.

Contact GE Power today for additional information.

Selective Catalytic Reduction Product Specifications

Parameter Typical Information
Reactor Size

3,200,000 acfm, 5,400,000 m3/h

Fuel Type Gas, fuel oil, orimulsion, pet coke, biofuel (virgin wood or peat), coal
Reactor Position High dust SCR for power plants and CHP plants; tail end SCR for waste incinerators

Reactor Flow Direction

  • Coal applications: vertical down
  • Oil applications: vertical up or vertical down
  • Gas applications: vertical up or vertical down and horizontal
Cleaning Method Soot blower using steam or compressed air, sonic air horns, air sweepers
NOx Removal Efficiency Up to 95%
NH3 Slip 2 vppvd @ 3% O2
Operation Temperature

570-815°F, 300-435°C for coal/oil

450-850°F, 230-435°C for gas

NOx Inlet Concentration 2050 mg/Nm3
O2 1% minimum
SO2 3,500 ppm
SO2/ SO3 Conversion 0.5 - 2.0%
Ash Load 35,000 mg/Nm3
Reagent Type Anhydrous ammonia, aqueous ammonia, urea

Contact GE Power Steam today to learn more about our Selective Catalytic Reduction.