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A Highly Selective and Stable Ruthenium‐Nickel Supported on Ceria Catalyst for Carbon Dioxide Methanation
Author(s) -
Elia Nathalie,
Estephane Jane,
Poupin Christophe,
El Khoury Bilal,
PiraultRoy Laurence,
Aouad Samer,
Aad Edmond Abi
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001687
Subject(s) - methanation , ruthenium , catalysis , nickel , cerium , inorganic chemistry , chemisorption , cerium oxide , temperature programmed reduction , chemistry , syngas , nickel oxide , materials science , organic chemistry
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, H 2 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 CO 2 were close to the thermodynamic equilibrium values with a 100 % selectivity towards CH 4 formation.