Effects of Na2CO3/K2CO3 on Chemical Looping Combustion Using Fe2O3/Al2O3 as Oxygen Carrier,Chemical Engineering & Technology

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Effects of Na2CO3/K2CO3 on Chemical Looping Combustion Using Fe2O3/Al2O3 as Oxygen Carrier
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-01-09 , DOI: 10.1002/ceat.201900409
Zhifeng Zhang ₁ , Yifei Wang ₁ , Longchu Zhu ₁ , Jilin Li ₁ , Fuchen Wang ₁ , Guangsuo Yu ₁

Affiliation

The performance of the Fe₂O₃/Al₂O₃ oxygen carrier modified by the alkali metals, Na and K, was studied by thermogravimetric analysis and in a laboratory‐scale fluidized‐bed reactor. Different factors, such as the alkali metal content, the alkali metal type, and the interaction between Na and K, were taken into account. Both Na and K had strong catalytic effects on the conversion of Fe₂O₃. A high K content caused serious agglomeration. Increasing the Na content led to slagging because of the low‐melting point solid solution. The possibility of agglomeration and slagging was reduced when Na and K were added together. The oxygen carrier with 1.5 wt % Na and 1.5 wt % K had better combustion efficiency and optimal thermal stability. Na and K could enhance the attrition resistance and prolong the lifetime of the oxygen carriers.

中文翻译：

Na2CO3 / K2CO3对以Fe2O3 / Al2O3为氧载体的化学循环燃烧的影响

通过热重分析和在实验室规模的流化床反应器中研究了被碱金属Na和K改性的Fe ₂ O ₃ / Al ₂ O ₃氧载体的性能。考虑了不同的因素，例如碱金属含量，碱金属类型以及Na和K之间的相互作用。Na和K均对Fe ₂ O ₃的转化具有强烈的催化作用。。高钾含量导致严重的团聚。由于低熔点固溶体，Na含量增加导致结渣。当将Na和K一起添加时，降低了结块和结渣的可能性。具有1.5重量％的Na和1.5重量％的K的氧载体具有更好的燃烧效率和最佳的热稳定性。Na和K可以增强耐磨耗性并延长氧载体的寿命。

更新日期：2020-01-09

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