Magnetocaloric Spheres
for Hydrogen Liquefaction Magnetic Refrigerator
Summary
We are developing Er-Co-based magnetocaloric spheres for hydrogen liquefaction magnetic refrigerators to achieve higher efficiency for the upcoming hydrogen society.
Development Summary
We are collaborating with the National Institute for Materials Science (NIMS) to develop magnetic spheres for magnetic refrigeration.
(Project name:Development of Advanced Hydrogen Liquefaction System by using Magnetic Refrigeration Technology for JST-MIRAI Large-scale Project)
- Comparison of Hydrogen Carriers
Liquid hydrogen is one of the most promising carriers, offering advantages of density and purity.
Transportation efficiency | Energy for hydrogen extraction | Handling temperature | Economic efficiency *Target by 2030 |
||
---|---|---|---|---|---|
Hydrogen density | Hydrogen content | ||||
Liquid hydrogen | 70.8% | 100kg-H2/m3 | 0.90kJ/mol-H2 | -253℃ | ¥30/Nm3 (*) |
MCH | 47.3% | 6.16kg-H2/m3 | 67.5kJ/mol-H2 | -95~100℃ | ¥50/Nm3 |
Ammonia | 121% | 17.8kg-H2/m3 | 30.6kJ/mol-H2 | -34℃ | ¥48/Nm3 |
Compressed hydrogen (350 atm) |
23.2% | 100kg-H2/m3 | - | Ordinary temperature | ¥30/Nm3 (*) |
Ref : Report from the Central Research Institute of Electric Power Industry (2018),
Report from the International Environment and Economy Institute (2020)
Prototype of Hydrogen Magnetic Refrigerator
Magnetocaloric property of Er-Co Magnetic Spheres
- Considerable large entropy change (ΔS) with magnetic field will enhance the performance of magnetic refrigerators for hydrogen liquefaction at 20 K (-253 ℃).
- Peak values of the entropy change (ΔS) with temperature can be adjusted by changing the concentrations of Al, Fe, or Ni.
Application of Core Technology
The following technologies owned by JX Metals enable the composition, particle size distribution, and particle shape of magnetic spheres to be controlled.
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Composition and Microstructure Design
- Metals, alloys,
and composites design
- Metals, alloys,
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Surface Design
- Surface deposition
and plating - Surface treatment
- Surface deposition
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Powder Design
- Powder manufacturing
- Powder handling
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Purification
- Melting
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Analysis and Evaluation
- Inorganic and
organic analysis - Surface analysis and
structural analysis
- Inorganic and
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Extraction and Refining
- Recycling
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