Research

Fe2TiO5 was studied for the reduction mechanism in chemical looping process. Fe2TiO5 pellets were reduced by syngas that demonstrated highest reduction rate in the beginning of reduction period from Fe2TiO5 to FeTiO3 and Fe2TiO4. The reduction of Fe2TiO5 is suggested in sequence from Fe2TiO4, FeTiO3 to Fe. Fe2TiO5 pellets performed reasonable reactivity and steady recyclability after continuous 100 redox cycles. The increased surface area and decreased mechanical strength for pellets operated after 30 redox cycles was due to formation of cracks and porous structures. Moreover, Fe2O3/TiO2 was the major crystalline phase existed in the pellets after 30 redox cycles. Fe2TiO5 attributed high syngas conversion in the fixed bed reactor due to high equilibrium constants. The completed reduced form of Fe2TiO5 oxygen carriers, Fe/TiO2, demonstrated hydrogen generation by steam oxidation, and the Fe was oxidized to Fe3O4 and FeTiO3 in the fixed bed reactor.