| 초록 |
This study has been focused on the adsorption and desorption of NH3 and NO on samples of a commercial V2O5-WO3/TiO2 catalyst with a promotor of Fe-MFI with a 96% exchange level to acquire a key role of the Fe ions in lowering the extent of the production of N2O in the selective reduction of NO by NH3. The bare V2O5/TiO2-based catalyst after adsorption of NH3 at 100oC following temperature-programmed desorption up to 500oC yielded a strong peak of N2O at 375oC with a weak band near 310oC. These desorption peaks all disappeared as the titania-supported vanadia sample was promoted using the Fe-MFI, although a new N2O peak was generated around 330oC but this peak intensity depending on the Fe-zeolite quantities became visibly reduced. These results propose that such a utilization of Fe-zeolites as a promotor in V2O5/TiO2-based catalysts can significantly suppress the extent of N2O formation in NH3-SCR reaction. |
