11 Fe2O3/Al2O3 and Fe2O3/TiO2/Al2O3 oxygen carriers were fabricated and evaluated for 12 chemical looping hydrogen generation (CLHG) using a TGA system and a fixed-bed 13 reactor. Oxygen carriers were converted to around 33% in a fixed-bed reactor to 14 ensure uniform reduction. The reduced oxygen carrier was tested for steam generation, 15 where in all cases Fe2O3/Al2O3 displayed a better conversion than Fe2O3/TiO2/Al2O3. 16 It was found that increasing the reaction temperature from 800 to 850

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... °C had little 17 effect for either oxygen carrier, but a further increase to 900 °C resulted in an 18 increased steam conversion. A higher steam flow rate caused a lower overall steam 19 conversion but a higher H2 production. A higher feed rate of reduced oxygen carrier 20 let to a higher steam conversion up to a rate of 18.4 and 14.9 g min -1 for Fe2O3/Al2O3 21 and Fe2O3/TiO2/Al2O3, respectively. A final comparison was performed with up to 50 22 redox cycles, where Fe2O3/Al2O3 showed superior reactivity in the first cycles but 23 ended at a conversion of 54.6% with Fe2O3/TiO2/Al2O3 ending at a conversion of 24 64.6%. 25 26