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- W118314114 abstract "Abstract Mn-containing catalysts exhibit a high NOx conversion in selective catalytic reduction (SCR) with NH3. Their high activity (80–100%) covers a broad temperature range (195–600 °C). 100% N2 formation is reached at about 230 °C for the catalysts prepared by Mn ion-exchanged in CBV-2314, a MFI zeolite. The catalysts obtained by Mn- or Fe-exchange zeolites are superior for N2 formation compared to those prepared by wet impregnation of Mn precursors on the γ-Al2O3 (80%)-TiO2 (20%) catalyst support. Since the Mn catalysts are active for NOx reduction in the intermediate temperature range of diesel engine exhaust mainly, an effort was undertaken in this study to extend this temperature range by promoting Mn with Cu, Ce and Fe oxides. These catalysts with two metals in the active phase were prepared and tested for DeNOx activity. All promoted catalysts showed higher formation of N2 at either low or high temperatures. The Ce/MnCBV-2314 catalyst was more active and stable at high temperatures, close to 600 °C, than those containing Fe or Cu oxides. Cu/MnCBV-2314 showed high activity at low temperature. 100% N2 formation for 2.1Mn/3.8FeCBV ranged from 220 to beyond 450 °C." @default.
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- W118314114 date "2012-07-01" @default.
- W118314114 modified "2023-09-27" @default.
- W118314114 title "Low-temperature selective catalytic reduction of NOx with NH3 over Mn-containing catalysts" @default.
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- W118314114 doi "https://doi.org/10.1016/j.apcatb.2012.04.012" @default.
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