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Ammonia Sorbent Traps


Ammonia (NH3) sorbent traps are used to measure ammonia levels at SCRs/SNCRs in order to monitor catalyst health and optimize ammonia injection rates.


The analysis is done using ion chromatography.



  • Measuring ammonia slip through the SCR/SNCR

  • Measuring ammonia between layers of the SCR to monitor catalyst layer performance.

  • Tying ammonia slip to catalyst health - particularly as it applies to mercury oxidation efficiency in the last layer of the SCR

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NH3 Sorbent Trap Application Diagram

Click to view details.