Abstract
This work investigates the effect of sodium and phosphorus on the DeNOx performances of model Cu-FER SCR catalysts with two copper loadings (2.8 wt% and 6.1 wt%). These inorganic elements, present in the Biodiesel fuels and lubricants, were added by wet-impregnation using two solvents: water or ethanol. Catalysts were evaluated in standard-SCR conditions as well as in NO and NH3 oxidation, and characterized by means of H2-TPR and NH3 adsorption monitored by FT-IR. It was evidenced that catalytic behaviors were highly influenced by the implemented impregnation route with a stronger impact of water as solvent. Whatever the studied catalysts, NH3 adsorption capacities decreased after addition of sodium and/or phosphorus. Interestingly, sodium and phosphorus acted differently on the poisoning of NH3 adsorption sites. Na mainly poisoned Brønsted acid sites and favored a back exchange with Cu2+ species (especially when Na was added in water), while phosphorus directly interacted with copper species, mainly in exchange position. The deactivation observed at low temperature (250 °C) was preferentially due to the decrease in NH3 adsorption together with the increase in the copper-phosphorus interaction, especially for copper species in exchange position.
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References
Brandenberger S, Kröcher O, Tissler A, Althoff R (2008) Catal Rev 50:492–531
Tarot M-L, Barreau M, Duprez D, Lauga V, Iojoiu EE, Courtois X, Can F (2018) Catalyts 8(1):4
Iojoiu E, Lauga V, Abboud J, Legros G, Bonnety J, Da Costa P, Schobing J, Brillard A, Leyssens S, Tschamber V, Anguita P, Vargas JG, Retailleau L, Gil S, Giroir-Findler A, Tarot M-L, Can F, Duprez D, Courtois X (2017) Emiss Control Sci Technol 4(1):4–32
Shwan S, Jansson J, Olsson L, Skoglundh M (2015) Appl Catal B 166–167:277–286
Wang D, Zhang L, Li J, Kamasamudram K, Epling WS (2014) Catal Today 231:64–74
Greenaway AG, Lezcano-Gonzales I, Agote-Aran M, Gibson EK, Odarchenko Y, Beal AM (2018) Top Catal 61:175–182
Acknowledgements
The authors acknowledge financial support from the European Union (ERDF), “Région Nouvelle Aquitaine” and the French National Agency for Research (ANR Appibio Project, Ref. ANR-14-CE22-0003).
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Tarot, ML., Can, F., Iojoiu, E.E. et al. Influence of Sodium and/or Phosphorus Addition on the Deactivation of Cu-FER Zeolites for SCR of NOx with NH3. Top Catal 62, 72–78 (2019). https://doi.org/10.1007/s11244-018-1117-9
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DOI: https://doi.org/10.1007/s11244-018-1117-9