Study on Reaction Characteristics of Chemical-Looping Combustion between Maize Stalk and High Index Facet Iron Oxide

Resumen

In this work, experiments were performed to investigate the activity and regeneration ability of iron-based oxygen carrier with high index facet (104) during chemical looping combustion (CLC), suggesting that morphological control of the oxygen carrier is very rewarding. Fe₂O₃(104) supported on Al₂O₃ was synthesized by a morphology controlled method to undertake maize stalk CLC experiments. Compared with the referenced Fe₂O₃/Al₂O₃ prepared by the impregnation method, Fe₂O₃(104)/Al₂O₃ presents better reactivity, showing higher fuel conversion rate and CO₂ concentration in gaseous products. Further, structural characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM) (LEO-1450) and Brunauer-Emmett-Teller (BET) analysis, and multi-cycles CLC reactions were performed to verify the good regeneration and stability of the Fe₂O₃(104)/Al₂O₃. The findings indicate that the Fe₂O₃(104)/Al₂O₃ is efficient when used for CLC of maize stalk.