Zero Ammonia Slip Guarantee with the NOxMASTER™ SCR System

Zero Ammonia Slip Guarantee with the NOxMASTER™ SCR System

As emission regulations become increasingly stringent across power generation, process industries, and large combustion plants, selective catalytic reduction (SCR) has emerged as the most reliable technology for deep NOₓ reduction. However, conventional SCR systems often face a persistent challenge: ammonia slip - the release of unreacted ammonia into the exhaust stream. The NOxMASTER™ SCR system addresses this challenge head-on by delivering a Zero Ammonia Slip Guarantee, without compromising NOₓ reduction efficiency.

 

Understanding Ammonia Slip in SCR Systems

In an SCR system, ammonia (or urea-derived ammonia) reacts with nitrogen oxides (NOₓ) over a catalyst to form harmless nitrogen and water vapor. Ammonia slip occurs when excess ammonia passes through the catalyst unreacted, typically due to:

• Load fluctuations or transient operating conditions
• Poor ammonia distribution
• Catalyst aging or fouling
• Conservative over-injection to ensure NOₓ compliance

Ammonia slip can lead to secondary pollution, odour issues, visible plumes, ammonium salt formation, and regulatory non-compliance.

 

The NOxMASTER™ Advantage

The NOxMASTER™ SCR system is engineered with an integrated, performance-driven design philosophy that balances aggressive NOₓ reduction with absolute ammonia control.

 

1. Precision AdBlue/Urea Injection Technology

NOxMASTER™ employs advanced ammonia injection/mixing grids designed using CFD-based flow modelling along with Air Injected Urea*. This ensures:

• Uniform NH₃/NOₓ molar ratio across the catalyst face
• Elimination of localized ammonia over-dosing
• Stable performance during transient conditions
• No Expensive injector failures!*

 

 

2. Advanced Control and Monitoring

The system integrates real-time feedback with adaptive control logic. This closed-loop control dynamically adjusts urea injection to:

• Match instantaneous NOₓ load
• Prevent over-injection during load swings
• Maintain optimal catalyst utilization

 

3. High-Performance Catalyst Design

NOxMASTER™ catalysts are selected and configured to deliver:

• High NOₓ conversion efficiency
• Broad operating temperature windows
• Long catalyst life with minimal deactivation

The catalyst formulation and layer arrangement are optimized to achieve deep NOₓ reduction while fully consuming injected urea.

 

4. Engineered for Real-World Operation

Unlike systems tuned only for design conditions, the NOxMASTER™ SCR is engineered for:

• Start-up and shutdown cycles
• Fuel variability
• Long-term aging effects

This ensures the zero ammonia slip guarantee is maintained throughout the system lifecycle.

 

For further information on our NOxMASTER™ SCR Systems, a copy of our reference list or to book a live site visit – please contact us +44 (0) 1342 713743 | info@agriemach.com | www.agriemach.com | www.noxmaster.co.uk