A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation

Nathalie Elia (1) , Jane Estephane (2) , Christophe Poupin (1) , Bilal El Khoury (2) , Laurence Pirault-Roy (3) , Samer Aouad (2) , Edmond Abi-Aad (1)

1 UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant
2 UOB - University of Balamand [Liban]
3 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]

The performance of nickel, ruthenium, and nickel-ruthenium impregnated on cerium oxide catalysts was tested in the methanation of carbon dioxide reaction. The nickel and ruthenium contents were 4 and 0.4 wt%, respectively. The properties of the catalysts were studied using elementary analysis, Brunauer-Emmet-Teller specific surface area measurements, X-ray diffraction, temperature programmed reduction, temperature programmed desorption, H2 chemisorption and transmission electron microscopy. The results showed that the addition of ruthenium improves the catalytic performance by promoting the dispersion of nickel species over the surface of the cerium oxide support. The ruthenium-nickel combination produced a stable catalyst that did not show any deactivation even after 75 hours on-stream. At high feed gas total pressures (5 and 10 bar), the catalytic conversions of CO2 were close to the thermodynamic equilibrium values with a 100 % selectivity towards CH4 formation.

Mots clés: cerium oxide; methanation; nickel; ruthenium; supported catalyst

Domaines: Catalyse

Nathalie Elia, Jane Estephane, Christophe Poupin, Bilal El Khoury, Laurence Pirault-Roy, et al.. A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation. ChemCatChem, 2021, 13 (6), pp.1559-1567. ⟨10.1002/cctc.202001687⟩. ⟨hal-03533610⟩