AIG Tuning

Periodic optimization of the ammonia-to-NOx distribution is helpful for reducing operation and maintenance (O&M) costs as well as ensuring the long-term optimal performance of an SCR catalyst system. Backed by extensive field experience on over 800 SCR systems, Cormetech provides state-of-the-art tuning and optimization services to enhance the performance of the reagent distribution system. The purpose of AIG tuning is to ensure an even ammonia-NOx molar ratio distribution to the catalyst. Proper AIG tuning ensures maximum system performance, reduced ammonia slip, and can effectively extend the catalyst life. The optimization process may also eliminate localized regions of high ammonia slip, which can lead to air preheater fouling.


The Multipoint Sampling System is capable of quickly and accurately performing AIG tuning to allow your system to operate at peak performance. The frequency of tuning is dictated by unit-specific conditions, including NOx distribution from the boiler and the style of AIG/mixer system in use. An annual check of the AIG distribution is recommended to maintain optimal SCR performance.