ASC (Ammonia Slip Catalyst)

ASC (Ammonia Slip Catalyst) is used in exhaust gas treatment, primarily in conjunction with SCR systems, to convert excess unreacted ammonia (NHโ‚ƒ) into nitrogen (Nโ‚‚) and water (Hโ‚‚O), preventing ammonia emissions pollution.

Key Points:

  1. Function: Eliminates residual ammonia after SCR, avoiding secondary pollution.
  2. Applications: Diesel vehicles, gas engines, industrial denitrification systems, etc.
  3. Advantage: Enhances environmental compliance, meeting strict emission standards (e.g., China VI, Euro VI).
  4. Principle: Catalytic oxidation (4NHโ‚ƒ + 3Oโ‚‚ โ†’ 2Nโ‚‚ + 6Hโ‚‚O).

In short, ASC acts as a “safety valve” for SCR systems, ensuring no ammonia leaks into the atmosphere.