Tar steam reforming for synthesis gas production over Ni-based on ceria/zirconia and La0.3Sr0.7Co0.7Fe0.3O3 in a packed-bed reactor

CO2 Hydrogenation to Synthetic Natural Gas over Ni, Fe and Co–Based CeO2–Cr2O3

“…Three distinct peaks at 325, 675, and 940 • C were found for NiO/CeO 2 -Cr 2 O 3 catalyst (c). The first two peaks were identical to the reduction of Ni 3+ to Ni 2+ and to the reduction of Ni 2+ to metallic nickel, respectively[34][35][36]. Some reduction of Cr 6+ ions to Cr 3+ ions could be combined in the first peak, whereas the second and the third peaks represented the reduction of the Cr 2 O 3 incorporated within the CeO 2 structure at the surface and bulk level, respectively.…”