文献类型：期刊文献

英文题名：Effects of Na2CO3/K2CO3 on Chemical Looping Combustion Using Fe2O3/Al2O3 as Oxygen Carrier

作者：Zhang, Zhifeng[1];Wang, Yifei[1];Zhu, Longchu[1];Li, Jilin[1];Wang, Fuchen[1];Yu, Guangsuo[1]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

年份：2020

卷号：43

期号：3

起止页码：412

外文期刊名：CHEMICAL ENGINEERING & TECHNOLOGY

收录：;EI(收录号：20200308038863);WOS:【SCI-EXPANDED(收录号:WOS:000506245100001)】；

基金：This work was supported by the National Key R&D Program of China under the Research Fund of 2017YFB0602800.

语种：英文

外文关键词：Alkali metal; Catalysis; Chemical looping combustion; Fe2O3; Al2O3 oxygen carrier

摘要：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.