Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming Article - Octobre 2018

Katarzyna Świrk, Maria Elena Gálvez, Monika Motak, Teresa Grzybek, Magnus Rønning, Patrick da Costa

Katarzyna Świrk, Maria Elena Gálvez, Monika Motak, Teresa Grzybek, Magnus Rønning, Patrick da Costa, « Yttrium promoted Ni-based double-layered hydroxides for dry methane reforming  », Journal of CO2 Utilization, octobre 2018, pp. 247-258. ISSN 2212-9820

Abstract

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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