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

Abstract

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. Fe2 O3 (104) supported on Al2 O3 was synthesized by a morphology controlled method to undertake maize stalk CLC experiments. Compared with the referenced Fe2 O3/Al2 O3 prepared by the impregnation method, Fe2 O3 (104)/Al2 O3 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 Fe2 O3 (104)/Al2 O3 . The findings indicate that the Fe2 O3 (104)/Al2 O3 is efficient when used for CLC of maize stalk.