(546u) Chemical Looping Partial Oxidation with Dry Reforming (CLPD) of Methane on a Ni-Promoted Fe2O3/Al2O3

In a chemical looping partial oxidation process, CH₄ is partially oxidized by metal oxide into syngas. The produced H₂/CO ratio is 2, which is desirable for the hydrocarbon production in the Fischer-Trophs reaction. However, since CH₄ also decomposes on the surface of metal, real-time H₂/CO ratio is much higher than 2 and the surface of metal oxide is severely coked. In this talk, CO₂ was utilized as a non-stoichiometric co-feed with CH₄ to derive dry reforming and coke gasification. Ni-enhanced Fe₂O₃/Al₂O₃ was synthesized as an oxygen carrier and a catalyst for dry reforming. Ni was entrapped on the Fe₂O₃/Al₂O₃ as a Ni-aluminate phase on the surface. This can further facilitate dry-reforming and suppress methane decomposition. By incorporating 1 wt% of Ni into the alumina matrix and supplying a nonstoichiometric CH₄-CO₂ mixture feed (CO₂/CH₄ ratio = 0.38), the H₂/CO ratio of about 2 and the CO selectivity of 96.76% were achieved with minimized carbon deposition.