Nano-MnOx catalyst for the selective catalytic reduction of NO by NH3 in low-temperature

Nanometer particles composed of manganese oxides (nano-MnOx), which prepared by rheological phase reaction method, show superior low-temperature SCR activity for NO with NH3 in the presence of excess O2. In experiments, the NO conversion is 98.25% at 80°C, and nearly 100% NO could be converted in 100-150°C. Due to the reason of competing adsorption, H2O has a slight impact on the activity and the deactivation of SO2 is reversible. The experiments implied that the superior low-temperature catalytic activity of nano-MnOx was mainly due to its high BET specific areas and poor crystallinity.