In order to achieve high NOx reduction, the gas mixture must be kept within a relatively narrow and high temperature range of 1600°F - 2100°F. No solid or liquid wastes are created in the SNCR process. While SNCR performance is specific to each unique application, NOx reduction levels ranging from 30% to 70% have been reported.

A recent progression in system design is the Hybrid SNCR/SCR system approach. By combining the two technologies, improvements can be seen in chemical and catalyst utilization, making the hybrid combination often more flexible and effective than the sum of its parts. A Hybrid system utilizes lower temperature SCNR injection to provide improved NOx reduction while generating higher ammonia slip. The residual ammonia slip is the reagent for a smaller SCR reactor that removes the slip and reduces NOx while limiting the costs associated with a larger catalyst volume.