Cu-IM-5 as the Catalyst for Selective Catalytic Reduction of NOx with NH3: Role of Cu Species and Reaction Mechanism
نویسندگان
چکیده
The role of Cu species in ion-exchanged IM-5 zeolite (Cu-IM-5) regarding the performance selective catalytic reduction (SCR) NOx with NH3 (NH3-SCR) and reaction mechanism was studied. Based on H2 temperature-programmed (H2-TPR) electron paramagnetic resonance (EPR) results, Cu–O–Cu isolated are suggested as main existing Cu-IM-5 active for SCR reaction. show a good NH3-SCR activity at temperatures below 250 °C, whereas their oxidation higher hinders performance. At low temperatures, NH4NO3 NH4NO2 key intermediates. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) suggests mixed Eley–Rideal (E–R) Langmuir–Hinshelwood (L–H) over temperatures.
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ژورنال
عنوان ژورنال: Catalysts
سال: 2021
ISSN: ['2073-4344']
DOI: https://doi.org/10.3390/catal11020221