Selective reduction of NO by NH3 over Fe-zeolite-promoted V2O5-WO3/TiO2-based catalysts: Great suppression of N2O formation and origin of NO removal activity loss

作者：Kim Moon Hyeon^*; Park Soo Won

来源：Catalysis Communications, 2016, 86: 82-85.

DOI：10.1016/j.catcom.2016.08.016

• Fe-zeolite promotion
• V2O3-WO3/TiO2
• Fe-ZSM-5
• NH3-SCR reaction
• N2O suppression

Great depression of the formation N2O in the selective catalytic reduction of NO by NH3 (NH3-SCR) has been studied by combining a V2O5-WO3/TiO2 (VWT) catalyst with a Fe-exchanged ZSM-5 zeolite (FeZ). At temperatures >400 degrees C, N2O formation was significant over VWT but <5 ppm over FeZ/VWT catalysts with the FeZ 8%. Unfortunately, all these FeZ-promoted catalysts disclosed a decrease in deNO(x)ing performances, due to an enhanced NH3 oxidation into NO. At temperatures >350 degrees C, the chemically-combined VWT-based FeZ systems could facilitate both N2O reduction with NH3 and N2O decomposition, thereby suppressing N2O emissions in NH3-SCR reaction.

• 出版日期2016-11-5