| 초록 |
This work has been focused on preparation and characterization of V2O5 – WO3 catalysts supported by Fe2+ - TiO2 and FeOx / TiO2 for NH3 - SCR reaction in order to depressing the emission of N2O from the NH3 - SCR reaction. In order to prepare a Fe2+-TiO2 support, TiO2 (DT51, Millennium Inorganic Chemicals) after drying at 110oC was hydroxylated in an aqueous solution of NH4OH (Aldrich, 28 – 32%). After hydroxylation, the sample was washed repeatedly and finally dried at 110oC. Introduction of Fe2+ ions was conducted by a well mixing of the hydroxylated TiO2 and FeCl2·4H2O followed by subliming this mixture in a quartz reactor under various conditions. the samples prepared here were extensively charaterized by using X-ray diffraction (XRD), temperature-programmed desorption (TPD), Raman spectroscopy, in situ diffuse reflectance infrared Fourier-transformed spectroscopy (DRIFTS) measurements. |
