Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

The presented work reports the selective catalytic reduction (SCR) of NO_x assisted by dielectric barrier discharge plasma via simulating marine diesel engine exhaust, and the experimental results demonstrate that the low-temperature activity of NH₃-SCR assisted by non-thermal plasma is enhanced significantly, particularly in the presence of a C₃H₆ additive. Simultaneously, CeMnZrO_x@TiO₂ exhibits strong tolerance to SO₂ poisoning and superior catalytic stability. It is worthwhile to explore a new approach to remove NO_x from marine diesel engine exhaust, which is of vital significance for both academic research and practical applications.