Industry
Sintering Machine CO & NOx Control Materials
Emission problems, pollutants, operating conditions and recommended materials for the sintering sector.
Typical emission problems
- High and fluctuating CO concentration
- Large gas flow with low pollutant concentration per volume
- Dust and SO₂ in the stream
Main pollutants
- CO
- NOx
- SO₂
- Dust
Operating conditions
Sintering flue gas is characterized by large flow, moderate temperature and fluctuating CO. Catalyst design must tolerate variation while maintaining conversion.
Recommended material selection
- CO oxidation catalyst sized for the CO load and space velocity
- SCR catalyst where NOx removal is also required
Engineering considerations
Sintering machine flue gas combines three hard conditions at once: large flow, moderate temperature and a gas that contains CO, SO₂, moisture and dust simultaneously. The CO concentration itself fluctuates with the sintering bed, so catalyst duty is dynamic rather than steady-state.
CO oxidation and SCR are frequently deployed together. The CO catalyst typically works at the temperature available downstream of dedusting; if the stream is too cold for light-off, heating-tube catalyst systems or partial heat recovery are used to bridge the gap. SCR follows with dust-tolerant geometry.
Field experience on sintering exhaust shows that inlet CO can swing by an order of magnitude within hours. The reactor must therefore be sized for the peak load, not the average, and the catalyst must survive repeated excursions without thermal damage.
Tell us about your stream
Gas flow, concentration, temperature, humidity, SO₂ and dust — we will recommend the right catalyst or adsorbent system.