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Article Dans Une Revue Journal of CO2 Utilization Année : 2018

Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming

Résumé

Yttrium modified Ni-based double-layered hydroxides were tested as novel catalysts in dry methane reforming. The catalysts were characterized by XRF, BET analysis, XRD, TPR-H2, TPD-CO2, TGA/DSC-MS, H2 chemisorption and TEM. Co-precipitation with yttrium (III) nitrate hexahydrate resulted in increased specific surface area, smaller Ni crystallite size, enhanced reducibility, and higher distribution of weak and medium basic sites as compared to Y-free material. The DRM catalytic tests, carried out in the temperature range of 850–600 °C, led to a significant improvement of activity, with the 1.5 wt % Y-promoted catalyst being the most efficient in converting both CH4 and CO2. Moreover, the 10 h test at 700 °C further confirmed enhanced stability for this HTNi-Y1.5 catalyst. Higher CO2 conversion than CH4 conversion and less CO compared to H2 proves that side reactions are occurring simultaneously.

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Chimie
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Dates et versions

hal-02307321 , version 1 (07-10-2019)

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Katarzyna Świrk, Maria Elena Gálvez, Monika Motak, Teresa Grzybek, Magnus Rønning, et al.. Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming. Journal of CO2 Utilization, 2018, 27, pp.247-258. ⟨10.1016/j.jcou.2018.08.004⟩. ⟨hal-02307321⟩
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