Figure 14.

Catalyst-assisted chemical looping auto-thermal dry reforming over a 9 wt % NiO-16 wt % Fe₂O₃/MgAl₂O₄ bifunctional material: (a) Schematic representation of the reactions in the two half-cycles; (b) Space-time yield of reagents and products as a function of temperature during reforming of a mixture with molar ratio CH₄:CO₂:O₂ = 1:1:0.5 over the bifunctional material. Region I: total oxidation, region II: dry and steam reforming, region III: auto-thermal dry reforming; (c) The ratio R_c between reducing gases (CO + H₂) and oxidizing gases (CO₂ + H₂O) as a function of reaction temperature during catalyst-assisted chemical looping auto-thermal dry reforming process, based on the experimental data of (b). Solid circles with dashed line as guide to the eye. Solid lines: Equilibrium lines of the iron/iron oxide system for each R_c at different temperatures.