
Oxygen Storage and Release Mechanism of Oxygen Carriers
Nina Chen, Zhiqiang Li, Longyi Guo, Longyu Wen, Lei Jiang, Kongzhai Li
Prog Chem ›› 2025, Vol. 37 ›› Issue (8) : 1156-1176.
Oxygen Storage and Release Mechanism of Oxygen Carriers
Chemical looping (CL) technology has been widely used in fields such as in-situ capture of carbon dioxide,hydrogen production,oxidative dehydrogenation and partial oxidation of methane. The development of oxygen carriers is the key link to the advancement of CL. Exploring the mechanism of oxygen storage and release in the oxygen carrier lattice is important for the design of high-performance oxygen carriers,the explanation of CL reaction mechanism,and the regulation of product selectivity and yield. First,this paper systematically reviews the research methods and progress of oxygen storage and release mechanism of oxygen carriers,presenting the important role of key characterization techniques in exploring the lattice oxygen migration mechanism. At the same time,we summarize the reaction mechanism of different types of oxygen carriers and the spatiotemporal evolution characteristics of active components,providing theoretical support for the design and modification of oxygen carriers. Furthermore,this paper also focuses on the difficulties and controversies in the study of oxygen storage and release mechanism of CL oxygen carriers. Finally,some perspectives on the current studies of mechanism for oxygen carriers were presented.
1 Introduction
2 The research method to study the mechanism of oxygen storage and release by oxygen carriers
2.1 Advanced characterization Techniques
2.2 Experimental design method
2.3 Primary calculation method
3 Study on lattice oxygen migration mechanism during oxygen storage and release
3.1 Lattice oxygen migration mechanism of spinel oxygen carriers
3.2 Lattice oxygen migration mechanism of perovskite-type oxygen carriers
3.3 Lattice oxygen migration mechanism of other metal based oxygen carriers
4 Study on metal ions migration mechanism during oxygen storage and release
5 Research limitations in oxygen storage and release processes
5.1 Limitations of the research method
5.2 Limitations of the research mechanism
chemical looping / characterization technology / lattice oxygen / oxygen storage and release mechanism / active ion
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