Industry
Emission Control Materials for the Steel Industry
Emission problems, pollutants, operating conditions and recommended materials for the steel sector.
Typical emission problems
- NOx from sintering, coking and reheating furnaces
- CO peaks from incomplete combustion
- Complex gas composition with SO₂ and dust
Main pollutants
- NOx
- CO
- SO₂
- Dust
Operating conditions
Steel plant streams vary widely between processes — sintering flue gas is large-flow with fluctuating CO, while furnace exhaust runs hotter. Material selection is done per stream.
Recommended material selection
- SCR catalysts matched to temperature window and dust
- CO oxidation catalysts for sintering machines
- Combined DeNOx + CO removal where both apply
Engineering considerations
Steel plants generate NOx and CO from multiple sources — sintering machines, coke ovens, reheat furnaces and pelletizing lines — each with a different temperature window and dust profile. There is no single catalyst that fits all of them; the correct approach treats each source as its own duty.
Sintering machine exhaust is the largest and most difficult stream: moderate temperature, thousands of ppm of CO, SO₂, moisture and residual dust after the electrostatic precipitator. A combined CO oxidation plus SCR layout is common, with the CO catalyst sized for the exotherm of a concentrated stream and the SCR catalyst chosen for dust tolerance.
Because steel production is continuous and outages are expensive, replacement planning matters. We track the pressure drop and conversion trends with the plant and recommend ordering the spare layer before the active layer crosses its deactivation limit.
Tell us about your stream
Gas flow, concentration, temperature, humidity, SO₂ and dust — we will recommend the right catalyst or adsorbent system.