Selective Non-Catalytic Reduction (SNCR)

Selective Non-Catalytic Reduction (SNCR)


SNCR systems provide a low-cost technique to reduce NOx emissions by 30%–75% for boilers, furnaces and kilns.

The SNCR process involves injecting a reagent into the flue gas in the appropriate temperature window. The reagent reacts with NOx to form harmless nitrogen and water. The design, arrangement, and location of the reagent injectors are critical to the performance of the SNCR system. Our advanced technology utilizes variable droplet size control and automatic tilting injectors based on furnace temperature, to enhance the NOx reduction performance.

SNCR System Package

Our SNCR systems include reagent storage tanks, pumping and flow control, reagent injection systems, and a boiler control interface. CCA also provides experienced field engineers for optimizing the SNCR in conjunction with the combustion system and overall operations.

Features & Benefits

  • Injection of urea or ammonia (mixed with air and water) into furnace section of field erected boilers
  • NOx reduction reaction temperature window: 1,650–2,100 °F
  • Optimum injector locations determined by CFD modeling of furnace and exhaust gas profiles
  • CCA developed unique tilting injector design to improve efficiency and reduce equipment costs
  • Low total cost of ownership
  • High-efficiency NOx removal, providing 30%–75% reduction
  • Energy efficient
  • Easy to retrofit with minimal downtime
Call Us

Dallas, TX, USA

Phone: 833-4NOxSCR (833-466-9727)


Monroe, CT, USA

Phone: 203-268-3139


Stansted, Essex, United Kingdom

Phone: +44-1439-330623


Dubai, United Arab Emirates

Phone: +971 (0) 4434 0004



Phone: +65-6472-0020


Shanghai, China

Phone: +86-21-62560387