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Steam reforming of iso-octane toward hydrogen production over mono- and bi-metallic Cu–Co/CeO2 catalysts: Structure-activity correlations

Al-Musa A.A., Ioakeimidis Zisis S., Al- Saleh M.S., Al-Zahrany A., Marnellos Giorgos E., Konsolakis Michail

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/467DE97E-1593-426A-BB2B-E947AA331B08-
Αναγνωριστικόhttps://doi.org/10.1016/j.ijhydene.2014.09.107-
Γλώσσαen-
Μέγεθος13en
ΤίτλοςSteam reforming of iso-octane toward hydrogen production over mono- and bi-metallic Cu–Co/CeO2 catalysts: Structure-activity correlationsen
Δημιουργός Al-Musa A.A.en
Δημιουργός Ioakeimidis Zisis S.en
Δημιουργός Al- Saleh M.S.en
Δημιουργός Al-Zahrany A.en
Δημιουργός Marnellos Giorgos E.en
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΕκδότηςElsevieren
ΠεριγραφήΔημοσίευση σε επιστημονικό περιοδικό el
ΠερίληψηΤhe feasibility of tailoring the iso-octane steam reforming activity of Cu/CeO2 catalysts through the use of Co as a second active metal (Cu20−xCox, where x = 0, 5, 10, 15, 20 wt%), is investigated. Characterization studies, involving N2 adsorption–desorption at −196 °C (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS) and Temperature Programmed Reduction (H2-TPR), were carried out to reveal the impact of the morphological, structural and surface properties of the catalysts on the reforming performance. The results showed that reforming activity was monotonically increased upon increasing cobalt loading. The Co/CeO2 catalyst demonstrated the optimum performance with a H2 yield of 70–80% in the 600–800 °C temperature interval. The Co/CeO2 catalyst exhibited also excellent stability at temperatures above 700 °C, while Cu-based catalysts rapidly deactivated in long term stability tests. A close correlation between surface/redox properties and steam reforming efficiency was established. The lower reducibility of Co/CeO2 catalysts, associated with the formation of Co3+ species, in Co3O4-like phase, can be accounted for the enhanced carbon tolerance of Co-based catalysts. Furthermore, the high concentration of surface oxygen species on Co/CeO2 catalysts can be considered for their enhanced performance. On the other hand, the Cu-induced easier reducibility of bimetallic catalysts, in conjunction with carbon deposition and active phase sintering can be accounted for their inferior steam reforming performance. Irreversible changes in the redox properties of Cu-based catalysts, taking place under reaction conditions, could be resulted to ceria deactivation thus hindering the redox process to keep onen
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-11-04-
Ημερομηνία Δημοσίευσης2014-
Θεματική ΚατηγορίαIso-octaneen
Θεματική ΚατηγορίαSteam reformingen
Θεματική ΚατηγορίαHydrogen productionen
Βιβλιογραφική ΑναφοράA.A. Al-Musa, Z.S. Ioakeimidis, M.S. Al- Saleh, A. Al-Zahrany, G.E. Marnellos, M. Konsolakis, "Steam reforming of iso-octane toward hydrogen production over mono- and bi-metallic Cu–Co/CeO2 catalysts: Structure-activity correlations," International Journal of Hydrogen Energy, vol. 39, no. 34, pp. 19541–19554, Nov. 2014. doi: 10.1016/j.ijhydene.2014.09.107en

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