The group of WANG Xiaodong at CAS Dalian Institute of Chemical Physics has applied „chemical looping“ for the preparation of syngas. In the reaction process, syngas (H2/CO=2) is prepared with 95 % selectivity from methane or a water-carbon dioxide mixture through intelligent switching between iron-based perovskites and Fe@0 oxides. An Fe-based La0.6Sr0.4Fe0.8Al0.2O3 composite with perovskite structure does not only stabilize the high-valent Fe4+ ions, but, after reduction by methane, nearly 50% of the Fe ions are reduced to zero valence, with high oxygen storage and release capacity, and a core-shell structure of Fe0@oxides.
CAS news release, September 7, 2018