High reactivity and durability of silicone-supported magnesium chloride composite material for ammonia using thermochemical energy storage
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- Enosawa Tetta
- Graduate Major in Nuclear Engineering, Institute of Science Tokyo
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- Yoshida Saki
- Graduate Major in Nuclear Engineering, Institute of Science Tokyo
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- Takasu Hiroki
- Laboratory for Zero-carbon Energy, Institute of Integrated Research, Institute of Science Tokyo
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- Kato Yukitaka
- Laboratory for Zero-carbon Energy, Institute of Integrated Research, Institute of Science Tokyo
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説明
Thermochemical energy storage (TcES) is a promising candidate for innovative energy-storage technologies. In this study, magnesium chloride (MgCl2)/ammonia (NH3) TcES composite material, particularly suitable for effectively utilizing low-temperature waste heat of approximately 100 °C, were developed and evaluated using an NH3-supplying thermobalance. A silicone-supported MgCl2 composite material was prepared to suppress volume expansion caused by the progression of the NH3 sorption reaction. The specific surface area of the prepared silicone-supported MgCl2 material increased from 7.6 to 21.6 m2 g-1 by the cyclic reaction, and the sorption number change achieved a theoretical value of 4.0. In addition, the heat-storage performance was observed to exhibit a heat storage density of 683 kJ L-1 and a maximum heat-storage rate of 0.668 kW L-1. These results confirmed that silicone-supported MgCl2 could suppress the volume expansion caused during the NH3 sorption reaction while maintaining its high reactivity to NH3. It was observed that silicone-supported MgCl2 and NH3 systems are promising material that can realistically be used for heat storage/output at approximately 100 °C.
収録刊行物
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- Progress in Nuclear Science and Technology
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Progress in Nuclear Science and Technology 7 (0), 279-285, 2025-03-31
Atomic Energy Society of Japan