Abstract
The reactivity of Cu -based oxygen carrier prepared by mechanical mixing for producing oxygen was investigated in a thermogravimetric analyzer. The results show that the oxygen carrier has excellent stability during reduction–oxidation cycles. This oxygen carrier showed a maximum oxygen transport capacity of 0.059 g/g during cycle experiments and the time for one cycle is less than 16 min. Phases and surface morphology of oxygen carriers were measured by X-ray diffraction and scanning electron microscope before and after experiments. The phases of reduced oxygen carrier are only Cu2O and TiO2 and of fresh or oxidized samples are only CuO and TiO2 . These reveal that the oxygen carrier is stable using the preparation process and under the operation conditions. SEM images show that the fresh and reacted oxygen carrier particles did not appear to disintegrate after 23 cycles.
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