Just Say Nox: The Application of Direct-Injection SCR for New and Retrofit Applications

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Jeff Broderick, Director of Retrofit Sales for CECO, joined Just Say NOx to talk about Catalytic Reduction Systems and the pros and cons of SCR and SNCR re-agent options for these systems.

“The overall goal of both of these systems, whether it’s an SCR or SNCR system, is to reduce the NOx generated by a combustion source, such as boilers, gas turbines, or engines,” Broderick said. “The SNCR process is a higher temperature process that does not require a catalyst but is slightly less efficient. The SCR process uses a catalyst to mix the exhaust and ammonia, and it is a much more efficient reaction, but it happens at a lower temperature.”

Safety, availability, environment and cost are all factors when choosing a system that utilizes either ammonia, hydrous ammonia or urea.

Before selecting the right method for NOx reduction, it is essential to consider all aspects and potential safety hazards.

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