Application background
Retrofit of an existing tail-gas train to meet updated NOx emission standards, at operating temperatures too low for conventional high-temperature SCR catalysts.
Feed gas & process conditions
| Gas | Industrial furnace tail gas |
|---|---|
| Flow | 120 000 Nm³/h |
| Pressure | Slightly above atmospheric |
| Temperature | 180 – 240 °C |
| Inlet impurities | NOx 450 mg/Nm³, SO₂ 100 mg/Nm³, dust 30 mg/Nm³ |
| Outlet requirement | NOx < 50 mg/Nm³, NH₃ slip < 3 ppm |
Main impurity challenge
High-activity DeNOx at low temperature with SO₂ and dust tolerance, minimal ammonia slip and long service life.
Recommended product
DeNOx Catalysts
Kaiteli SCR-LT DeNOx Catalyst
Low-temperature vanadium-tungsten titania SCR catalyst engineered for high SO₂ tolerance.
Technical result
- Outlet NOx < 40 mg/Nm³ verified continuously by CEMS.
- NH₃ slip < 2 ppm; no SO₃ formation issues.
- First-year deactivation < 5%.
Customer value
Guaranteed compliance with tightened NOx standards, avoided plant shutdown risk, and extended catalyst service life to > 3 years.