化学链燃烧
反应性(心理学)
燃烧
烧结
氧化还原
固体燃料
化学工程
烧焦
煤
化学
掺杂剂
兴奋剂
材料科学
无机化学
有机化学
医学
替代医学
光电子学
病理
工程类
作者
Zhong Ma,Yonggang Lu,Guofu Liu
出处
期刊:Fuel
[Elsevier]
日期:2022-09-01
卷期号:324: 124625-124625
被引量:8
标识
DOI:10.1016/j.fuel.2022.124625
摘要
Aiming at the problems of low redox activity and easy sintering deactivation of iron-based oxygen carriers (OCs), Sr was used to modify Fe2O3/Al2O3 in chemical looping combustion (CLC) of solid fuels. The Sr doped Fe2O3/Al2O3 possessed high fuel combustion reactivity with different solid fuels (coal, coal char and biomass). During consecutive cycles, high cycling durability and morphological preservation were observed for Sr doped Fe2O3/Al2O3, signifying that the addition of strontium effectively enhanced the anti-sintering ability and inhibited the phase segregation of Fe2O3/Al2O3 during cyclic reactions. By comparing the coal char combustion reactivity of Fe2O3/Al2O3 samples doped with different SrO content (1 wt%, 5 wt% and 10 wt%), the optimum additive amount of SrO was 5 wt%. In addition, the characterization analysis proved that the Sr dopant suppressed the outward diffusion of Fe cations and maintained the surface micro-morphology of Fe2O3/Al2O3 in the process of CLC. This study presented important guiding principle and strategy for the synthesis of iron-based OCs with high cyclic redox reactivity in the CLC of solid fuels.
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