LAUSR

Chemical looping water splitting systems operate at relative high temperatures (450-800 degree C) to produce, purify or store hydrogen by cyclically reduce-oxidize a solid oxygen carrier. Therefore, to improve the long-term operation it is necessary to develop highly stable oxygen carriers with high specific surface areas. In this work, highly interconnected doped Fe2O3 foams is fabricated by the freeze-casting technique, the use of a submicrometric camphene-based suspension help to prevent Fe sintering and pore clogging during redox operation. The influence of the dopant elements (Al and Ce) over the pore morphology evolution and redox performances are examined. The use of a Fe2O3 porous structure with initial pore size above 100 microns shows a significant reduction of the sample densification and the addition of Al2O3 by co-precipitation process prove to be beneficial to prevent the core-shell structure after redox processing