Study of the dry reforming of methane and ethanol using Rh catalysts supported on doped alumina
| Autor: | Laurence Pirault-Roy, Esa Turpeinen, Rachid Brahmi, Nicolas Bion, Prem Kumar Seelam, Florence Epron, Riitta L. Keiski, Satu Ojala, Asmaa Drif |
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| Přispěvatelé: | University of Oulu, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC), Université Chouaib Doukkali (UCD) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Alumina-based mixed oxides
Carbon dioxide reforming Hydrogen Chemistry Process Chemistry and Technology Rh catalysts Metallurgy Non-blocking I/O chemistry.chemical_element Ethanol dry reforming [CHIM.CATA]Chemical Sciences/Catalysis 7. Clean energy Catalysis Rhodium law.invention Nickel law Methane dry reforming [CHIM]Chemical Sciences Calcination Dispersion (chemistry) Nuclear chemistry |
| Zdroj: | Applied Catalysis A : General Applied Catalysis A : General, Elsevier, 2015, 504 pp. 576-584 ⟨10.1016/j.apcata.2015.02.019⟩ |
| ISSN: | 0926-860X |
| DOI: | 10.1016/j.apcata.2015.02.019⟩ |
| Popis: | International audience; AbstractVarious MxOy-Al2O3 oxides (M =Zr, Mg, Ni, Ce, La), prepared by a sol-gel method, were used as supports for rhodium catalysts in methane and ethanol dry reforming. After calcination, the Rh/MxOy-Al2O3 catalysts present BET surface areas between 85 and 208 m(2) g(-1). For the CH4 dry reforming, the highest yields in hydrogen are obtained in the following ranking: Rh/NiO-Al2O3 > Rh/Al2O3 > Rh/MgO-Al2O3 approximate to Rh/CeO2-Al2O3 > Rh/ZrO2-Al2O3 > Rh/La2O3-Al2O3, not very different from the one for ethanol dry reforming at 800 degrees C which is: Rh/NiO-Al2O3 >> Rh/Al2O3 Rh/MgO-Al2O3 approximate to Rh/CeO2-Al2O3 > Rh/ZrO2-Al2O3 approximate to Rh/La2O3-Al2O3, although the reaction temperature is different. For the two reactions, the best catalyst is Rh/NiO-Al2O3 even if it deactivates during the reaction due to carbon deposition. This high activity may be explained by both the presence of the NiAl2O4 spinel phase, avoiding the deactivation of rhodium by migration in alumina, and the high dispersion of Rh favored by the presence of nickel particles at the support surface. Moreover, Ni particles on the support surface also contribute to the activity as demonstrated by the high hydrogen yield obtained in the presence of NiO-Al2O3, which is similar to the one obtained with Rh/Al2O3 |
| Databáze: | OpenAIRE |
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