Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/7D3A4A52-8218-4A6A-9597-3BF8DF6E47CF | - |
| Αναγνωριστικό | https://www.mdpi.com/1420-3049/21/5/644 | - |
| Αναγνωριστικό | https://doi.org/10.3390/molecules21050644 | - |
| Γλώσσα | en | - |
| Μέγεθος | 20 pages | en |
| Τίτλος | Ethyl acetate abatement on copper catalysts supported on ceria doped with rare earth oxides | en |
| Δημιουργός | Carabineiro, Sónia Alexandra Correia | en |
| Δημιουργός | Konsolakis Michail | en |
| Δημιουργός | Κονσολακης Μιχαηλ | el |
| Δημιουργός | Marnellos, Georges E | en |
| Δημιουργός | Asad Muhammad Faizan | en |
| Δημιουργός | Soares Olívia Salomé Gonçalves Pinto | en |
| Δημιουργός | Tavares Pedro Bandeira | en |
| Δημιουργός | Pereira Manuel Fernando R. | en |
| Δημιουργός | Orfão, José Joaquim de Melo | en |
| Δημιουργός | Figueiredo José Luís | en |
| Εκδότης | MDPI | en |
| Περίληψη | Different lanthanide (Ln)-doped cerium oxides (Ce0.5 Ln0.5 O1.75, where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt. %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N2 adsorption at -196°C, scanning/transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and temperature programmed reduction in H2. The following activity sequence, in terms of EtOAc conversion, was found for bare supports: CeO2 ≈ Ce0.5Pr0.5O1.75 > Ce0.5Sm0.5O1.75 > Ce0.5Gd0.5O1.75 > Ce0.5Nd0.5O1.75 > Ce0.5La0.5O1.75. Cu addition improved the catalytic performance, without affecting the activity order. The best catalytic performance was obtained for Cu/CeO2 and Cu/Ce0.5Pr0.5O1.75 samples, both achieving complete EtOAc conversion below ca. 290°C. A strong correlation was revealed between the catalytic performance and the redox properties of the samples, in terms of reducibility and lattice oxygen availability. No particular correlation between the VOC oxidation performance and textural characteristics was found. The obtained results can be explained in terms of a Mars-van Krevelen type redox mechanism involving the participation of weakly bound (easily reduced) lattice oxygen and its consequent replenishment by gas phase oxygen. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2018-10-16 | - |
| Ημερομηνία Δημοσίευσης | 2016 | - |
| Θεματική Κατηγορία | Copper (Cu)-based catalysts | en |
| Θεματική Κατηγορία | Ethyl acetate oxidation | en |
| Θεματική Κατηγορία | Mixed oxides | en |
| Θεματική Κατηγορία | Rare earth oxides | en |
| Θεματική Κατηγορία | Volatile organic compounds (VOCs) | en |
| Βιβλιογραφική Αναφορά | S. A. C. Carabineiro, M. Konsolakis, G. E.-N. Marnellos, M. F. Asad, O. S. G. P. Soares, P. B. Tavares, M. F. R. Pereira, J. J. De Melo Órfão and J. L. Figueiredo, "Ethyl acetate abatement on copper catalysts supported on ceria doped with rare earth oxides," Molecules, vol. 21, no. 5, May 2016. doi: 10.3390/molecules21050644 | en |
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