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Effects of Na2CO3/K2CO3 on Chemical Looping Combustion Using Fe2O3/Al2O3 as Oxygen Carrier
Chemical Engineering & Technology ( IF 2.418 ) Pub Date : 2020-01-09 , DOI: 10.1002/ceat.201900409
Zhifeng Zhang; Yifei Wang; Longchu Zhu; Jilin Li; Fuchen Wang; Guangsuo Yu

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.
更新日期:2020-01-09

 

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