Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis

doi:10.1016/j.cjche.2020.11.023

中国化学工程学报 ›› 2021, Vol. 32 ›› Issue (4): 408-415.DOI: 10.1016/j.cjche.2020.11.023

• Energy, Resources and Environmental Technology • 上一篇下一篇

Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis

Lei Liu, Zhenshan Li, Ye Li, Ningsheng Cai

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2020-03-30 修回日期:2020-09-22 出版日期:2021-04-28 发布日期:2021-06-19
通讯作者: Zhenshan Li
基金资助:
The research has received funding from the National Natural Science Foundation of China (51976102), the National Key Research and Development Plan of China (2016YFB0600802-A and No. 2017YFE0112500).

Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis

Lei Liu, Zhenshan Li, Ye Li, Ningsheng Cai

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Received:2020-03-30 Revised:2020-09-22 Online:2021-04-28 Published:2021-06-19
Contact: Zhenshan Li
Supported by:
The research has received funding from the National Natural Science Foundation of China (51976102), the National Key Research and Development Plan of China (2016YFB0600802-A and No. 2017YFE0112500).

摘要/Abstract

摘要： Oxygen uncoupling characteristics of a natural manganese ore and a perovskite-type oxide CaMn_0.5Ti_0.375Fe_0.125O₃ were studied by using a microfluidized bed thermogravimetric analysis (MFB-TGA) technology which is based on a real-time mass measurement of fluidizing particles inside a bubbling bed reactor. The chemical stability, kinetics of the oxygen release and uptake reactions and fluidization property were investigated and the experimental data measured by MFB-TGA were compared with the results in a regular TGA instrument (TGA Q500). The regular TGA Q500 results show the reactivity of both the manganese ore and perovskite oxide are stable for multi cycles, and the oxygen uncoupling capacity of the manganese ore is ~1.2% (mass) which is ~2 times higher than that of the perovskite oxide. However, the experimental results from the MFB-TGA indicated that there is a serious agglomeration for the manganese ore. A very important finding is that the reaction rate of oxygen release and oxygen uptake of the perovskite oxide measured by the MFB-TGA are ~2 and ~4 times faster than that of testedby the TGA Q500. We can conclude that MFB-TGA is a very useful tool to measure the reactivity stability and kinetics of oxygen carriers in high-throughput analysis instead of the regular TGA.

关键词: CO₂ capture, Oxygen carrier, Oxygen uncoupling, Fluidized-bed, Thermogravimetric analysis, Agglomeration

Abstract: Oxygen uncoupling characteristics of a natural manganese ore and a perovskite-type oxide CaMn_0.5Ti_0.375Fe_0.125O₃ were studied by using a microfluidized bed thermogravimetric analysis (MFB-TGA) technology which is based on a real-time mass measurement of fluidizing particles inside a bubbling bed reactor. The chemical stability, kinetics of the oxygen release and uptake reactions and fluidization property were investigated and the experimental data measured by MFB-TGA were compared with the results in a regular TGA instrument (TGA Q500). The regular TGA Q500 results show the reactivity of both the manganese ore and perovskite oxide are stable for multi cycles, and the oxygen uncoupling capacity of the manganese ore is ~1.2% (mass) which is ~2 times higher than that of the perovskite oxide. However, the experimental results from the MFB-TGA indicated that there is a serious agglomeration for the manganese ore. A very important finding is that the reaction rate of oxygen release and oxygen uptake of the perovskite oxide measured by the MFB-TGA are ~2 and ~4 times faster than that of testedby the TGA Q500. We can conclude that MFB-TGA is a very useful tool to measure the reactivity stability and kinetics of oxygen carriers in high-throughput analysis instead of the regular TGA.

Key words: CO₂ capture, Oxygen carrier, Oxygen uncoupling, Fluidized-bed, Thermogravimetric analysis, Agglomeration

Lei Liu, Zhenshan Li, Ye Li, Ningsheng Cai. Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis[J]. 中国化学工程学报, 2021, 32(4): 408-415.

Lei Liu, Zhenshan Li, Ye Li, Ningsheng Cai. Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 408-415.

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Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis

Evaluation of oxygen uncoupling characteristics of oxygen carrier using micro-fluidized bed thermogravimetric analysis

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