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. 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.
Highlights
Chemical-looping combustion (CLC) is a novel and efficient technology with inherent separation of CO2, avoiding extra energy consumption [1,2]
Fe2 O3 /Al2 O3, and pyrolysis of maize stalk under the presence of Al2 O3 were studied for reference
200 ◦ C, dehydration occurs with 2 wt % moisture released, and the reason for mass loss larger than value listed in Table 1 can be chalked up to the good hydroscopicity of γ-Al2 O3
Summary
Chemical-looping combustion (CLC) is a novel and efficient technology with inherent separation of CO2 , avoiding extra energy consumption [1,2]. The CLC system is usually composed of two reactors, namely. In FR, oxygen carrier transfers lattice oxygen to fuel to generate excellent performance in CLC withof lignite and experimentally, which put forward a new CO. H2 O,theoretically a CO2 stream can be obtained. O. After condensation thinking in developing efficient iron based OC in CLC [10]. OC is transported back to the air reactor (AR) and oxidized by air for the cycle of reaction
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