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Volume 107
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Development of an in-situ micro fluidized bed thermogravimetric analysis method for assessing attrition behavior of oxygen carrier particles in chemical looping
Songming Yao, Lei Liu *
Hunan Engineering Research Center of Clean and Low-Carbon Energy Technology, School of Energy Science and Engineering, Central South University, Changsha, 410083, China
10.1016/j.partic.2025.10.002
Volume 107, December 2025, Pages 81-91
Received 22 July 2025, Revised 21 September 2025, Accepted 6 October 2025, Available online 17 October 2025, Version of Record 22 October 2025.
E-mail: csu_liu@csu.edu.cn
Highlights

• Micro fluidized bed thermogravimetry was proposed to obtain attrition rate.

• Attrition behaviors of Ilmenite,iron ore,and laterite ore were investigated.

• Contributions of chemical,thermal,and mechanical stresses were revealed.

• This work provides a tool to determine attrition behavior of oxygen carrier in lab.


Abstract

It is evident that oxygen carriers play a pivotal role in the chemical looping combustion. Although the majority of studies have concentrated on enhancing the high-temperature thermal stability and reactivity of oxygen carriers,it is imperative to study the attrition behaviors of oxygen carriers precisely. In this work,a micro fluidized bed thermogravimetric analysis (MFB-TGA) was developed to obtain the attrition properties through real-time measurement of weight changes during the redox reactions. Ilmenite, iron ore, and laterite ore were selected as the oxygen carriers, and the contributions of mechanical, thermal, and chemical stresses to oxygen carrier attrition were investigated. It was found that ilmenite and iron ore started stable attrition just after the 20th and 5th cycles due to the activation phenomenon. Laterite ore suffered a fast attrition stage with a rate of 0.37 % h−1 before the 20th cycle, after that, the attrition rate changed to be slow. At the end of activation, ilmenite and iron ore attrition was led by mechanical stress with the proportion of ∼40 %, while chemical stress was the predominant factor of laterite ore attrition with the proportion of ∼57.6 %. The proposed micro fluidized bed thermogravimetric method provides an effective and convenient pathway to determine,evaluate,and compare the attrition behavior of oxygen carriers in laboratory.

Graphical abstract
Keywords
Chemical looping combustion; Oxygen carrier; Micro fluidized bed thermogravimetry; Attrition property
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