The ASC Ammonia Slip Catalyst is a high-performance environmental solution designed specifically for advanced emission control in gas turbine and industrial boiler systems. As global emission standards tighten, managing "ammonia slip"—the unreacted ammonia (NH3) that bypasses the SCR (Selective Catalytic Reduction) process—has become critical for operational efficiency and environmental compliance.
Product Introduction & Usage
In the gas turbine denitrification process, excess ammonia is often injected to ensure NOx levels meet strict regulatory targets. This excess NH3 can lead to equipment corrosion and environmental pollution. The GRACE ASC catalyst is strategically installed downstream of the SCR system. Its primary function is to capture and convert escaping ammonia into harmless nitrogen (N2) and water vapor (H2O) through highly selective catalytic oxidation.
Technical Advantages
High Conversion Efficiency: Ensures ammonia emissions remain below 3ppm, meeting the most stringent international air quality standards.
Low Pressure Drop Design: Tailored for high-exhaust-volume environments, the GRACE solution minimizes backpressure to maintain peak engine thermal efficiency.
Synergistic Emission Reduction: Beyond eliminating ammonia odors, it inhibits the generation of secondary NOx and prevents the formation of ammonium bisulfate (ABS).
Wide Temperature Adaptability: Maintains high catalytic activity across a broad temperature range, making it ideal for fluctuating exhaust conditions.
| Parameter |
Standard Specification |
| Catalyst Type |
ASC (Ammonia Slip Catalyst) |
| Active Components |
Precious Metal / Composite Metal Oxides |
| Efficiency (NH3 Removal) |
>=90% |
| Operating Temperature |
280°C – 450°C |
| Pressure Drop |
< 100 Pa (Application Dependent) |
| Support Material |
Honeycomb Ceramic |
Process Flow & Installation
Exhaust Entry: Flue gas containing NOx and escaped NH3 passes through the SCR stage.
Catalytic Oxidation: The gas enters the GRACE ASC layer downstream.
Selective Conversion: NH3 reacts with residual oxygen to form N2 and H2O.
Clean Discharge: Purified exhaust gas exits the stack without the risk of downstream fouling.
Operation & Maintenance
To ensure longevity, operators should monitor the pressure differential across the catalyst bed regularly. GRACE catalysts are designed for durability, but preventing soot accumulation and maintaining stable exhaust temperatures will maximize the catalyst's service life.
After-Sales & FAQ
Q: Does the ASC increase NOx emissions? No. Our advanced selective oxidation technology specifically inhibits secondary NOx formation.
Q: Can this be retrofitted into existing SCR systems?
Yes, the low-profile design of GRACE catalysts allows for easy integration into existing flue gas ducts with minimal modifications.
Service Support: We provide comprehensive site evaluations, catalyst activity testing, and replacement services to ensure your system remains in 100% compliance.
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Honeycomb Ceramic ASC Catalyst for Efficient Ammonia Escape Control Images
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