Toluene steam reforming using nickel based catalysts made from mining residues
| Autor: | El-Hadi Benyoussef, Nicolas Abatzoglou, Salma Belbessai, François Gitzhofer, Ines Esma Achouri |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Toluene Catalysis 0104 chemical sciences Steam reforming chemistry.chemical_compound Nickel chemistry Chemical engineering 13. Climate action Specific surface area Temperature-programmed reduction 0210 nano-technology Incipient wetness impregnation Filamentous carbon |
| Zdroj: | Catalysis Today. 365:111-121 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2020.07.087 |
| Popis: | Two nickel-based catalysts are used for toluene steam reforming: Ni-Olivine and Ni-UGSO (Nickel-UpGraded Slug Oxides). Both catalysts are made from mining residues and prepared by incipient wetness impregnation (IWI). The activity and stability of the two catalysts in toluene steam reforming are investigated and compared, at atmospheric pressure and 800 °C in a fixed bed reactor. Reaction temperature and Ni Loading effects are evaluated for the Ni-UGSO catalyst. The physicochemical properties of the catalysts were analyzed using the following characterization techniques: X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX), X-ray absorption near edge spectroscopy (XANES), Temperature Programmed Reduction (TPR) and Brunauer-Emmett-Teller (BET) specific surface area. Results showed that toluene conversion, mainly into CO and H2, reached up to (98 w%). The catalyst activity was tested in multiple 24 h time-on-stream continuous isothermal runs and no signs of deactivation were observed. Ni in Ni-UGSO has a strong metal-support interaction, which, according to characterization results, is due to the formation of a NiO/MgO solid solution. This catalyst exhibited an elevated catalytic activity along with a high resistance to carbon formation. Ni in Ni-Olivine has shown a weak metal-support interaction leading to the formation of filamentous carbon at the catalyst’s surface. |
| Databáze: | OpenAIRE |
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