LAB solutions ensure treatment of Nitrogen Oxydes (NOx) by :
- Non-catalytic process (SNCR),
- Combination of noncatalytic and catalytic (TermiNOxLAB™)
- Catalytic systems (SCR) with control and limitation of ammonia (NH3) slip.
SNCR
Selective non-catalytic reduction (SNCR) is a method to capture nitrogen oxide emissions , thanks to the injection of either ammonia or urea into the boiler to react with the nitrogen oxides formed in the combustion process.
SCR - CataLAB™
CataLAB™ consists in the reduction of Nitrogen Oxides (NOx) by injection of ammonia or urea (liquid) upstream a catalyst.
CataLAB™ is a SCR DeNOx process with successive layers of honeycomb or plates catalysts.
Its position in the flue gas cleaning system can be as follows:
- Downstream a de-duster before acid gases removal : low dust SCR
- Downstream acid gases removal in clean gas conditions : tail-end SCR
- At lower temperature downstream an efficient dry system : cold SCR (with regeneration if needed)
NOx removal on CataLAB™ is easily combinable with catalytic destruction of dioxins/furans and/or treatment of CO.
All CataLAB™ units are designed with control of ammonia slip under most stringent regulations.
Tail-end SCR
SCR - TermiNOxLAB™
TermiNOx LAB™ is a process for NOx removal combining non-catalytic system in the boiler and slip catalyst in the flue gas cleaning.
TermiNOx LAB™ integrates a catalyst layer downstream a de-duster using the ammonia SNCR slip to upgrade the NOx removal performances of the overall system and to limit NH3 emissions at the stack.
The following reagents can be used for TermiNOx LAB™:
- Urea pellets
- Liquid urea
- Ammonia
