Abstract
The Cu based zeolite NH3-SCR catalysts are well-known for after treatment of exhaust gases from light-and heavy-duty diesel engines. However, these catalysts are easily deactivated under the co-presence of H2O and SO2. In the present study, Sb–V–CeO2/TiO2 catalyst showed superior conversion for the abatement of NOx with NH3 under H2O and SO2 condition compared to commercial Cu–SAPO-34 and CuFe–ZSM-5 zeolite catalysts. The physico-chemical properties of fresh and used catalysts were examined by BET surface area, TEM (Transition electron microscopy) with EDS/EDX (Energy dispersive spectrometer/X-ray), XPS (X-ray photoelectron spectroscopy), DRIFTS (in situ diffuse reflectance infrared Fourier transformed spectroscopy) and H2-TPR (temperature programmed reduction). Higher than 95% of initial NOx conversion was obtained over Sb–V–CeO2/TiO2 catalyst at 250 °C under 14% H2O and 50 ppm SO2 conditions. The SO2 on/off test of the CuFe–ZSM-5 and Cu–SAPO-34 catalysts indicated a drastic decrease of NOx conversion when SO2 was turned on. In contrast, Sb–V–CeO2/TiO2 catalyst maintained a high NOx conversion and initial NOx conversion was completely recovered when SO2 was turned off.
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This work was financially supported by ‘Future Core Technology’ program from KIST (Korea Institute of Science & Technology).
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Jeong, Y.E., Kumar, P.A., Ha, H.P. et al. Highly Active Sb–V–CeO2/TiO2 Catalyst Under Low Sulfur for NH3-SCR at Low Temperature. Catal Lett 147, 428–441 (2017). https://doi.org/10.1007/s10562-016-1951-y
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DOI: https://doi.org/10.1007/s10562-016-1951-y