Pr-doped Modified Fe-Mn/TiO2 Catalysts with a High Activity and SO2 Tolerance for NH3-SCR at Low-Temperature

Pr-modified Fe-Mn/TiO2 (x Pr) catalysts with high activity and excellent SO2 resistance were prepared and used for the selective catalytic reduction of NO with NH3 (NH3-SCR) at low-temperatures. Pr can inhibit FeOx and MnOx crystallization and stabilize the high valence states of Fe and Mn, maintaining the catalyst's high activity and stability at low temperatures. Doping with Pr diminished the ammonium sulfate deposition and alleviated the sulfation, improving the catalysts' sulfur resistance. Graphic