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A comparative study of the H2-assisted selective catalytic reduction of nitric oxide by propene over noble metal (Pt, Pd, Ir)/γ-Al2O3 catalysts

Goula, Maria, Charisiou Nikolaos D., Papageridis Kiriakos N., Delimitis Andréas, Papista Eleni, Pachatouridou Eleni, Iliopoulou Eleni F., Marnellos, Georges E, Konsolakis Michail, Gentekakis Ioannis

Απλή Εγγραφή

URIhttp://purl.tuc.gr/dl/dias/CDC0E3B8-56B3-4908-B8A3-E7FED6979155-
Αναγνωριστικόhttps://www.sciencedirect.com/science/article/pii/S2213343716300690?via%3Dihub-
Αναγνωριστικόhttps://doi.org/10.1016/j.jece.2016.02.025-
Γλώσσαen-
Μέγεθος13 pagesen
ΤίτλοςA comparative study of the H2-assisted selective catalytic reduction of nitric oxide by propene over noble metal (Pt, Pd, Ir)/γ-Al2O3 catalystsen
ΔημιουργόςGoula, Mariaen
ΔημιουργόςCharisiou Nikolaos D.en
ΔημιουργόςPapageridis Kiriakos N.en
ΔημιουργόςDelimitis Andréasen
ΔημιουργόςPapista Elenien
ΔημιουργόςPachatouridou Elenien
ΔημιουργόςΠαχατουριδου Ελενηel
ΔημιουργόςIliopoulou Eleni F.en
ΔημιουργόςMarnellos, Georges Een
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΔημιουργόςGentekakis Ioannisen
ΔημιουργόςΓεντεκακης Ιωαννηςel
ΕκδότηςElsevieren
ΠερίληψηThe impact of H2 as additional reducing agent on the SCR of NO with C3H6 in excess oxygen, was comparatively explored over low noble metal loading (0.5 wt%), Pt/γ-Al2O3, Pd/γ-Al2O3, Ir/γ-Al2O3 catalysts. To gain insight into the role of H2, the reactions NO + C3H6 + O2 (R#1), NO + C3H6 + O2 + H2 (R#2), NO + H2 + O2 (R#3) were employed. In respect to propene oxidation, the Pd > Pt > Ir sequence was obtained under R#1, since they exhibit complete conversion at 220, 250, 325 °C, respectively; all metals exhibit moderate deNOx performances (XNO, <40%). H2 co-presence (R#2) promotes both the NO and C3H6 conversions, which is valid in the whole temperature interval investigated (50-400 °C), being more substantial for Pt/γ-Al2O3 and Ir/γ-Al2O3, less beneficial for Pd/γ-Al2O3. A two-maxima feature is obtained on XNO pattern (at ∼100 and ∼230 °C) of Pt and Pd during R#2. The low temperature maximum-attributed to NO reduction by H2-is substantially more pronounced on Pt than Pd, offering XNO ∼90% and SN2 ∼85%; the high temperature maximum-attributed to NO reduction by C3H6-is higher by ∼15% on both Pt and Pd, in respect to the values obtained during R#1, while SN2 remained unaffected. Different XNO pattern with one maximum is obtained over Ir, implying a synergistic interaction between H2 and C3H6. This synergy is accompanied by a substantial widening of the NO reduction window toward lower temperatures and a considerable increase on both XNO,max and SN2 (from XNO ∼30% with SN2 ∼55% during R#1 to XNO ∼70% with SN2 ∼95% during R#2). The specific features of all reactions and metals employed are comparatively discussed.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2018-10-12-
Ημερομηνία Δημοσίευσης2016-
Θεματική ΚατηγορίαHydrogenen
Θεματική ΚατηγορίαIren
Θεματική ΚατηγορίαLean NOx reductionen
Θεματική ΚατηγορίαPden
Θεματική ΚατηγορίαPropeneen
Θεματική ΚατηγορίαPten
Θεματική ΚατηγορίαSelective catalytic reductionen
Βιβλιογραφική ΑναφοράM. A. Goula, N. D. Charisiou, K. N. Papageridis, A. Delimitis, E. Papista, E. Pachatouridou, E. F. Iliopoulou, G. Marnellos, M. Konsolakis and I. V Yentekakis, "A comparative study of the H2-assisted selective catalytic reduction of nitric oxide by propene over noble metal (Pt, Pd, Ir)/γ-Al2O3 catalysts," J. Environ. Chem. Eng., vol. 4, no. 2, pp. 1629-1641, Jun. 2016. doi: 10.1016/j.jece.2016.02.025en

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