The Digest’s 2025 Multi-Slide Guide to Low Greenhouse Gas NOx Control

This research fundamentally clarifies N2O formation mechanisms during low-temperature SCR using Cu-zeolite catalysts and advanced characterization (DRIFTS/EPR). Key findings indicate that N2O formation is driven by the gaseous NO2 pool and that Brönsted acid sites (BAS) catalyze NH4NO3 decomposition. This work supports advanced technological solutions, demonstrating that a multi-component catalyst bed arrangement (Fe-CHA and composite SCO-SCR) provides high NOx conversion with low N2O emissions.