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

• 作者: Lei Liu Zhenshan Li Ye Li Ningsheng Cai
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Energy, Resources and Environmental Technology
• 页码范围: 408-415
• 页数: 8页
• 语种: 英文

摘要

Oxygen uncoupling characteristics of a natural manganese ore and a perovskite-type oxide CaMn0.5Ti0.375Fe0.125O3 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 flu-idization 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 reac-tivity of both the manganese ore and perovskite oxide are stable for multi cycles, and the oxygen uncou-pling 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 agglomer-ation for the manganese ore. A very important finding is that the reaction rate of oxygen release and oxy-gen 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.