NOx Control

Selective Non-Catalytic Reduction (SNCR)

SNCR removes nitrogen oxides by injecting a reductant such as urea or ammonia straight into the combustion chamber, in a high temperature window of 850°C to 1,100°C, turning the harmful gas into pure nitrogen and water vapour.

Engineering
Turnkey
Retrofit
Commissioning
After-sales Support

Get Advice

Selective Non-Catalytic Reduction (SNCR)

Precision is the whole system

Because SNCR uses no catalyst, precise control of the chemical injection is the heart of it. Where that precision is missing, removal efficiency drops, and an incomplete reaction can push the NOx level up rather than down.

This is why the injection points are settled by simulation before anything is installed, rather than adjusted on site afterwards.

Computational Fluid Dynamics

CFD simulation of the furnace beside the installed SNCR injection lances — Designing an SNCR system with CFD simulation. Conditions inside the furnace are analysed to fix the exact lance positions (left), which are then installed on site (right), so the NOx reduction reaction runs to completion.

Where SNCR fits

The combustion chamber reaches 850°C to 1,100°C

No catalyst volume or pressure drop can be added

Injection can be controlled precisely across the load range

Not sure whether SCR or SNCR suits you?

The choice turns on temperature, space and how far the NOx has to come down. Send us the operating data and we will set out both options.

Request a NOx Assessment