Thermochemical energy storage by LiNO3-doped Mg(OH)2: Rehydration study
| Autor: | Yukitaka Kato, Hiroki Takasu, Yuri I. Aristov, Alexandr Shkatulov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Materials science Lithium nitrate Renewable Energy Sustainability and the Environment Magnesium 020209 energy Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology medicine.disease Thermal energy storage Energy storage Industrial waste chemistry.chemical_compound chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering medicine Dehydration Electrical and Electronic Engineering 0210 nano-technology Water vapor |
| Zdroj: | Journal of Energy Storage. 22:302-310 |
| ISSN: | 2352-152X |
| Popis: | Thermochemical energy storage (TCES) is an emerging technology promising for reuse of industrial waste heat and harvesting solar energy. Recently, a novel material, namely, a magnesium hydroxide doped with lithium nitrate LiNO3/Mg(OH)2, was suggested for TCES at temperature lower than 300 °C [ 1 ]. The LiNO3 additive to Mg(OH)2 was found to decrease the Mg(OH)2 dehydration temperature by 76 °C which, to the best of our knowledge, is the largest depression reported in the literature so far. The large heat storage capacity (1250 J/g) and fast dehydration made this material promising for TCES. In this work, the LiNO3/Mg(OH)2 is studied with a focus on the reverse reaction of its hydration by water vapour which allows the stored heat to be released. The rehydration kinetics is studied at various temperatures (90–150 °C), water vapour pressures (16.7–33.5 kPa), and LiNO3 contents (0.5–20 wt.%) to outline the boundary conditions of closed TCES cycle for which this material may be used. The material is found to be stable in ten successive de-/rehydration cycles. Finally, the applicability of the material for storage of heat from some particular heat sources is discussed. |
| Databáze: | OpenAIRE |
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