SCR Retrofit Improves Performance - Brochure

Anticipated catalyst replacement projects provide an opportune time to assess the performance of existing SCR units. A careful review of SCR system design should be made when the time comes to replace the catalyst especially if the catalyst is deactivating earlier than expected. In many cases premature catalyst failure is actually caused by poor design of the SCR system itself, which can be masked initially due to the fact that new catalysts normally outperform their guarantee for a period of time as they go through a “break in” stage. Effective SCR operation requires very uniform distribution of airflow and ammonia for optimal performance. Improvements can be made to both the airflow patterns and the ammonia distribution within existing SCR units that will reduce the pressure drop, improve the reduction efficiencies, reduce ammonia consumption and increase the future catalyst life. These upgrades can save money and reduce downtime.