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Microencapsulation of Metal-based Phase Change Material for High-temperature Thermal Energy Storage

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Title: Microencapsulation of Metal-based Phase Change Material for High-temperature Thermal Energy Storage
Authors: Nomura, Takahiro Browse this author →KAKEN DB
Zhu, Chunyu Browse this author →KAKEN DB
Sheng, Nan Browse this author
Saito, Genki Browse this author →KAKEN DB
Akiyama, Tomohiro Browse this author →KAKEN DB
Issue Date: 13-Mar-2015
Publisher: Nature Publishing Group
Journal Title: Scientific Reports
Volume: 5
Start Page: 9117
Publisher DOI: 10.1038/srep09117
Abstract: Latent heat storage using alloys as phase change materials (PCMs) is an attractive option for high-temperature thermal energy storage. Encapsulation of these PCMs is essential for their successful use. However, so far, technology for producing microencapsulated PCMs (MEPCMs) that can be used above 500 degrees C has not been established. Therefore, in this study, we developed Al-Si alloy microsphere MEPCMs covered by alpha-Al2O3 shells. The MEPCM was prepared in two steps: (1) the formation of an AlOOH shell on the PCM particles using a boehmite treatment, and (2) heat-oxidation treatment in an O-2 atmosphere to form a stable alpha-Al2O3 shell. The MEPCM presented a melting point of 573 degrees C and latent heat of 247 J g(-1). The cycling performance showed good durability. These results indicated the possibility of using MEPCM at high temperatures. The MEPCM developed in this study has great promise in future energy and chemical processes, such as exergy recuperation and process intensification.
Type: article
Appears in Collections:エネルギー・マテリアル融合領域研究センター (Center for Advanced Research of Energy and Material) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 能村 貴宏

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