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- W2008040521 abstract "A series of Fe-exchanged molecular sieves were studied as catalysts for the selective catalytic reduction (SCR) of NO with ammonia. It was found that Fe–ZSM-5 and Fe–mordenite catalysts were highly active for the SCR reaction. Nearly 100% NO conversions were obtained at 400–500°C under conditions with a high space velocity (GHSV=4.6×105 l/h). However, Fe–Y and Fe–MCM-41 with larger pore sizes showed lower activities for this reaction. For Fe–ZSM-5 catalysts, the SCR activity decreased with increasing Si/Al ratio in the zeolites. As the Fe-exchange level in the Fe–ZSM-5 catalysts was increased from 58 to 252%, NO conversion increased at lower temperatures (e.g., 300°C), but decreased at high temperatures (e.g., 600°C). Compared with the commercial vanadia catalyst, based on the first-order rate constants, the Fe–ZSM-5 catalyst was five times more active at 400°C and seven times more active at 450°C. It also functioned in a broader temperature window, produced only N2 (rather than N2O) and H2O, and showed a substantially lower activity for oxidation of SO2 to SO3." @default.
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- W2008040521 date "1999-12-01" @default.
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- W2008040521 title "Catalytic Performance of Fe–ZSM-5 Catalysts for Selective Catalytic Reduction of Nitric Oxide by Ammonia" @default.
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