N2O abatement over γ-Al2O3 supported catalysts: Effect of reducing agent and active phase natureN2O abatement over γ-Al2O3 supported catalysts: Effect of reducing agent and active phase nature Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-11-032009enA series of metal catalysts (Pd, Rh, Ru, Cu, Fe, In and Ni) supported on γ-Al2O3 carrier, were evaluated during N2O catalytic conversion to N2 in the absence and presence of excess oxygen and reducing agents (CH4 or C3H8). Among all catalysts tested, Pd-, Ru- and Rh-based samples exhibited the best catalytic performance, in all reaction conditions examined. The reaction was inhibited by O2, in particular at lower temperatures, while its effect was essentially negligible at higher ones. In the presence of reducing agents and under lean reaction conditions, N2O conversion was comparably enhanced, with C3H8 being more efficient than CH4; however even in the presence of hydrocarbons N2O decomposition is the major pathway for N2O abatement, since reducing agents mainly act as oxygen scavengers reducing and concurrently activating the metal sites. The influence of different co-existing gases (CO, H2O and SO2) on the performance of Pd supported catalysts was also investigated, whereas thermal stability tests in the presence of SO2 indicate a gradual irreversible decrease in activity until a new steady state was established.Δημοσίευση σε επιστημονικό περιοδικό http://creativecommons.org/licenses/by/4.0/Topics in Catalysis13521880-1887 Pekridis Georgios Πεκριδης Γεωργιος Athanasiou Costas Konsolakis Michail Κονσολακης Μιχαηλ Yentekakis Ioannis V. Marnellos George E. Springer US N2O decomposition Reducing agents Metal supported catalysts