5 years ago

Low-temperature selective catalytic reduction of NOx with NH3 over MnFeOx nanorods

Low-temperature selective catalytic reduction of NOx with NH3 over MnFeOx nanorods
A series of MnFeOx nanorods with different Fe/Mn molar ratios were successfully synthesized by the hydrothermal method for low temperature selective catalytic reduction (SCR) of NOx with NH3. These MnFeOx catalysts have been systematically characterized by SEM, TEM, XRD and XPS. Furthermore, the MnFe(0.1)Ox showed the highest catalytic performance with nearly 100% of NOx removal efficiency from 200 to 350°C. On the basis of the TPR, BET and in situ DRIFT results, it can be found that the addition of Fe species induced a possible redox reaction process and increased the surface chemisorbed oxygen concentration and acid sites, which should be responsible for the enhanced SCR activity of MnFe(0.1)Ox. Meanwhile, several important process parameters affecting NOx removal efficiency in NH3-SCR were carried out, such as time, H2O and SO2.

Publisher URL: www.sciencedirect.com/science

DOI: S1385894717311622

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