Ceria promotion over Ni-containing hydrotalcite-derived catalysts for CO₂ methane reforming

¹ AGH University of Science and Technology, Faculty of Energy and Fuels, Al. A.Mickiewicza 30, 30-059, Kraków, Poland
² Sorbonne Universités, UPMC, Univ. Paris 6, CNRS, UMR 7190, Institut Jean Le Rond D’Alembert, 2 Place de la Gare de Ceinture, 78210 Saint-Cyr-L’Ecole, France

^* Corresponding author: debek@agh.edu.pl

Abstract

The catalytic activity in dry methane reforming of hydrotalcite-derived catalysts with ceria and/or nickel species introduced into hydrotalcite interlayer spaces was examined. The prepared materials were characterized (XRF, XRD, FT-IR, H₂-TPR and N₂ sorption) and subsequently tested in CO₂ methane reforming at 550 °C. The obtained results showed that the incorporation of nickel species between hydrotalcite layers resulted in active catalyst with no sign of carbon deposition. Additionally, a beneficial effect of ceria promotion was observed. Ceria-promoted sample exhibited higher activity, stability and selectivity towards DRM, which may be explained by the formation of small Ni crystallites and prevention of the formation of inactive NiAl₂O₄ spinel phase.