Ceria and zirconia modified natural clay based nickel catalysts for dry reforming of methane |
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| Authors: | Hongrui Liu Patrick Da Costa Haithem Bel Hadj Taief Mourad Benzina Maria Elena Gálvez |
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| Affiliation: | 1. Sorbonne Universités, UPMC, Univ. Paris 6, Institut Jean Le Rond d''Alembert, 2 place de la gare de ceinture, 78210 Saint-Cyr-L''Ecole, France;2. CNRS, UMR 7190, Institut Jean Le Rond d''Alembert, 2 place de la gare de ceinture, 78210 Saint-Cyr-L''Ecole, France;3. Laboratoire Eau, Energie et Environnement (LR3E), Code: AD-10-02, Ecole Nationale d''Ingénieurs de Sfax, Université de Sfax, B.P1173.W.3038 Sfax, Tunisia |
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| Abstract: | Ce and Zr promoted Fe/Cu-modified natural clay based catalysts were prepared and tested in dry reforming of methane (DRM) at temperatures from 600 to 800 °C. The physicochemical properties of these catalysts were analyzed by means of N2 adsorption, X-ray diffraction (XRD). H2-temperature programmed reduction (H2-TPR) and CO2-temperature programmed desorption (TPD). Ce and Zr promotion resulted in a considerable increase of the catalytic activity. This increase can be mainly ascribed to an improved reducibility of Ni species, together with slightly higher Ni0 crystal size, that, on the other hand, also catalyze undesired parallel reactions resulting in carbon formation, such as direct methane decomposition. Both Ce and Zr presence also promoted the presence of weak and medium strength basic sites, which are thought to favor CO2 adsorption and desorption on the catalyst surface, leading to enhanced catalytic activity. |
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| Keywords: | Natural clay Ni catalysts Hydrogen Syngas Dry reforming Promoters |
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