Abstract
The properties of the Mn–Ce/Beta zeolite catalyst in the selective catalytic reduction (SCR) of NO x have been investigated. The introduction of Ce leads to a marked increase in the NO x conversion at 100–250°C. The data of this study are consistent with the “bifunctional” pathway of SCR suggested for Mn/Beta, which consists of two stages—NO oxidation to NO2 over the oxide component and “fast” SCR over the zeolite. The increased activity of Mn–Ce/Beta at the NO-to-NO2 oxidation stage is due to the formation of MnCeO x mixed oxides enhancing the mobility of lattice oxygen. The determining role is played by the activity of the zeolite component in the “fast” SCR reaction.
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Original Russian Text © D.S. Krivoruchenko, N.S. Telegina, D.A. Bokarev, A.Yu. Stakheev, 2015, published in Kinetika i Kataliz, 2015, Vol. 56, No. 6, pp. 729–734.
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Krivoruchenko, D.S., Telegina, N.S., Bokarev, D.A. et al. Mn–Ce/beta “bifunctional” catalyst for the selective catalytic reduction of nitrogen oxides with ammonia. Kinet Catal 56, 741–746 (2015). https://doi.org/10.1134/S0023158415060051
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DOI: https://doi.org/10.1134/S0023158415060051