URI | http://purl.tuc.gr/dl/dias/B3533E1A-E953-4BF0-AF27-5E2141693F89 | - |
Αναγνωριστικό | https://doi.org/10.1016/j.cej.2023.145644 | - |
Αναγνωριστικό | https://www.sciencedirect.com/science/article/pii/S1385894723043759 | - |
Γλώσσα | en | - |
Μέγεθος | 26 pages | en |
Τίτλος | Efficient CO2 hydrogenation over mono- and bi-metallic RuNi/MCM-41 catalysts: controlling CH4 and CO products distribution through the preparation method and/or partial replacement of Ni by Ru | en |
Δημιουργός | Rontogianni Anatoli | en |
Δημιουργός | Ροντογιαννη Ανατολη | el |
Δημιουργός | Chalmpes Nikolaos | en |
Δημιουργός | Nikolaraki Ersi | en |
Δημιουργός | Νικολαρακη Ερση | el |
Δημιουργός | Botzolaki Georgia | en |
Δημιουργός | Μποτζολακη Γεωργια | el |
Δημιουργός | Androulakis Athanasios | en |
Δημιουργός | Ανδρουλακης Αθανασιος | el |
Δημιουργός | Stratakis Antonios | en |
Δημιουργός | Στρατακης Αντωνιος | el |
Δημιουργός | Zygouri Panagiota | en |
Δημιουργός | Moschovas Dimitrios | en |
Δημιουργός | Avgeropoulos Apostolos | en |
Δημιουργός | Karakassides Michael A. | en |
Δημιουργός | Gournis Dimitrios | en |
Δημιουργός | Tsatsos Sotirios | en |
Δημιουργός | Kyriakou Georgios | en |
Δημιουργός | Boukos Nikos | en |
Δημιουργός | Panagiotopoulou Paraskevi | en |
Δημιουργός | Παναγιωτοπουλου Παρασκευη | el |
Δημιουργός | Gentekakis Ioannis | en |
Δημιουργός | Γεντεκακης Ιωαννης | el |
Εκδότης | Elsevier | en |
Περιγραφή | This research has been co-financed by the European Union and Greek national funds through the Greece 2.0 National Recovery and Resilience Fund, under the call RESEARCH - CREATE - INNOVATE (projects code: T1EDK-00782 and T2EDK-00955) | en |
Περίληψη | CO2 methanation is receiving special attention nowadays due to the urgent environmental and energy need to control/recycle CO2 emissions. Herein the reaction is investigated over mono- and bi-metallic RuNi catalysts supported on mesoporous MCM-41 materials. Monometallic-Ru catalysts were always superior to their monometallic-Ni counterparts, while the bimetallic-RuNi, although outperforming monometallic-Ni, were inferior to monometallic-Ru. The CO2 methanation efficiency of monometallic-Ni catalysts was found to be highly dependent on the catalyst preparation method: One-pot synthesis provided catalysts almost completely ineffective for methanation, but very effective for the reverse-water–gas-shift (RWGS) reaction producing syngas at low temperatures. In striking contrast, compositionally identical Ni catalysts prepared by impregnation were efficient in CO2 methanation. An important for practical purposes redispersion of already stabilized large Ni crystallites was achieved by adding small amounts of Ru via the formation of core(Ru)-shell(Ni) nano-configurations. Detailed characterizations, kinetic and in-situ DRIFTS studies allowed the convincing interpretation of the novel findings. | 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 | 2025-09-10 | - |
Ημερομηνία Δημοσίευσης | 2023 | - |
Θεματική Κατηγορία | CO hydrogenation | en |
Θεματική Κατηγορία | RuNi bimetallic catalysts | en |
Θεματική Κατηγορία | Μesoporous MCM-41 silica | en |
Θεματική Κατηγορία | CO methanation | en |
Θεματική Κατηγορία | Sabatier reaction | en |
Βιβλιογραφική Αναφορά | A. Rontogianni, Ν. Chalmpes, E. Nikolaraki, G. Botzolaki, A. Androulakis, A. Stratakis, P. Zygouri, D. Moschovas, A. Avgeropoulos, M. Α. Karakassides, D. P. Gournis, S. Tsatsos, G. Kyriakou, N. K. Boukos, P. Panagiotopoulou, and I. V. Yentekakis, “Efficient CO2 hydrogenation over mono- and bi-metallic RuNi/MCM-41 catalysts: controlling CH4 and CO products distribution through the preparation method and/or partial replacement of Ni by Ru,” Chem. Eng. J., vol. 474, Oct. 2023, doi: 10.1016/j.cej.2023.145644. | el |