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- W1978350932 abstract "Isotope labeled 15NO was used to investigate the mechanism of the unusual overconsumption of NH3 during standard SCR over Fe-zeolite, under conditions during which NH3 oxidation with O2 alone (without NO) was unfavorable. When the Fe-BEA catalyst was exposed to the 15NO + 14NH3 + O2 gas mixture at 250 and 300 °C, the resulting products included 14NO, a product of 14NH3 oxidation under SCR conditions. However, 14NO was not detected when Fe-BEA was exposed to 14NH3 + O2. Since the only source of 14N derives from 14NH3, with the labeled gas mixture used, the 14NO during SCR must have originated from oxidation of 14NH3. Furthermore, twice as much 14N14N was observed at 300 °C under SCR conditions in comparison with NH3 oxidation using O2 alone. Under SCR conditions, the 14NO formed through the unusual oxidation route further reacted with 14NH3 to produce 14N2. Thus, for the first time, we have experimental evidence for the unusual overconsumption of ammonia during SCR over Fe-zeolites." @default.
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- W1978350932 date "2013-03-01" @default.
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- W1978350932 title "Experimental evidence of the mechanism behind NH3 overconsumption during SCR over Fe-zeolites" @default.
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- W1978350932 doi "https://doi.org/10.1016/j.jcat.2012.11.009" @default.
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