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Nitrous oxide decompositionover Al2O3 supported noble metals (Pt, Pd, Ir): Effect of metalloading and feed composition”

Papista E., Pachatouridou Eleni, Iliopoulou E.F. , Delimitis A. , Goula G., Yentekakis Ioannis.V., Marnellos G.E. , Konsolakis Michail

Απλή Εγγραφή

URIhttp://purl.tuc.gr/dl/dias/AAE0F987-3FA3-4E60-BA5A-9457B2C0F5E5-
Αναγνωριστικόhttps://doi.org/10.1016/j.jece.2015.03.030-
Γλώσσαen-
ΤίτλοςNitrous oxide decomposition over Al2O3 supported noble metals (Pt, Pd, Ir): Effect of metal loading and feed composition”en
Δημιουργός Papista E.en
ΔημιουργόςPachatouridou Elenien
ΔημιουργόςΠαχατουριδου Ελενηel
ΔημιουργόςIliopoulou E.F. en
ΔημιουργόςDelimitis A. en
Δημιουργός Goula G.en
Δημιουργός Yentekakis Ioannis.V.en
ΔημιουργόςMarnellos G.E. en
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΠερίληψηThe N2O decomposition (de-N2O) performance of Al2O3 supported, low content (0.25, 0.5 and 1.0 wt.%) noble metal (Pt, Pd, Ir) catalysts, is comparatively explored in the present study. The effect of metal content, operation temperature and feed composition on de-N2O performance is investigated. Characterization studies involving BET, XRD, TEM and H2-TPR were also carried out to reveal the impact of metal entity and content on the structural, morphological and redox characteristics of the catalysts. The catalytic results imply that the de-N2O performance is in general increased upon increasing metal loading, a fact being more intense over Ir-based catalysts. Under oxygen deficient conditions, N2O conversions as high as ∼100% and ∼80% are reached at 600 °C over Ir- and Pd-based catalysts, respectively, instead of only ∼30%, achieved over Pt-based catalysts. A moderate degradation in oxygen excess conditions is observed with Ir and Pd catalysts, while Pt-based catalysts are almost fully depressed. The superior de-N2O performance of Ir-, Pd-based catalysts can be mainly interpreted by taking into account the formation of metal oxide phases, not easily susceptible to oxygen poisoning. For Ir-based catalysts the active phase seems to be mainly the metal oxide phase (IrO2), as revealed by H2-TPR, XRD and TEM experiments. In the case of palladium catalysts two different metal phases, i.e. PdO and metallic Pd0 were detected. On the other hand, platinum catalysts presented only metallic Pt0 species, which are prone to poisoning by strongly adsorbed oxygen atoms.en
ΤύποςΠλήρης Δημοσίευση σε Συνέδριοel
ΤύποςConference Full Paperen
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by-nc-nd/4.0/en
Ημερομηνία2015-11-15-
Ημερομηνία Δημοσίευσης2014-
Θεματική ΚατηγορίαCatalytic N2O decompositionen
Θεματική ΚατηγορίαPlatinumen
Θεματική ΚατηγορίαPalladiumen
Βιβλιογραφική ΑναφοράE. Papista, E. Pachatouridou, E.F. Iliopoulou, A. Delimitis, G. Goula, I.V. Yentekakis, G.E. Marnellos and M. Konsolakis, “Nitrous Oxide Decomposition over Al2O3 Supported Noble Metals (Pt, Pd, Ir): Effect of Metal Loading and Feed Composition” in 2014 13th International Conference on Clean Energy, doi: 10.1016/j.jece.2015.03.030en

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