CO and CO2 methanation over Ni catalysts supported on CeO2, Al2O3 and Y2O3 oxides

By C. Italiano, Jordi Llorca, L. Pino, M. Ferraro, V. Antonucci, A. Vita. 2020

338 citations recorded by the source corpus.

Abstract Methanation of carbon oxides (CO and CO2) was studied over Ni-based catalysts supported on CeO2, Al2O3, and Y2O3 oxides. Catalysts were synthesized by solution combustion synthesis and characterized by N2-physisorption, XRD, H2-TPR, TEM, CO-chemisorption, UV–vis DRS, XPS, and CO2-TPD. The effect of reaction temperature (250−500 °C) was investigated under atmospheric pressure, space velocity (GHSV) of 10,000 h−1, and stoichiometric reactants ratio of (H2-CO2)/(CO + CO2) = 3. It can be concluded that the nature of Ni-support interactions played a crucial role in enhancing CO and CO2 hydrogenation at low reaction temperature. Ni/CeO2 catalyst deactivated rapidly due to coke deposition, while the formation of NiAl2O4 spinel explained the lower activity of the Al2O3-supported system. Activity data for Ni/Y2O3 catalysts were closely related to the degree of Ni dispersion as well as to the medium-strength basicity. Good anti-coking and anti-sintering ability were observed after 200 h of lifetime test.

Subfields: Catalysis, Materials Chemistry, Process Chemistry and Technology

View Paper: https://www.semanticscholar.org/paper/168b2b64a73946342316cb8da82013f2c7d15f12