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Thermochemical Storage of Middle Temperature Wasted Heat by Functionalized C/Mg(OH) 2 Hybrid Materials

Author

Listed:
  • Emanuela Mastronardo

    (National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Florence, Italy
    Department of Engineering, University of Messina, 98166 Messina, Italy)

  • Yukitaka Kato

    (Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo 152-8550, Japan)

  • Lucio Bonaccorsi

    (Department of Civil, Energetic, Environmental and Materials Engineering, Mediterranean University of Reggio Calabria, 89124 Reggio Calabria, Italy)

  • Elpida Piperopoulos

    (Department of Engineering, University of Messina, 98166 Messina, Italy)

  • Candida Milone

    (Department of Engineering, University of Messina, 98166 Messina, Italy)

Abstract

For the thermochemical performance implementation of Mg(OH) 2 as a heat storage medium, several hybrid materials have been investigated. For this study, high-performance hybrid materials have been developed by exploiting the authors’ previous findings. Expanded graphite (EG)/carbon nanotubes (CNTs)-Mg(OH) 2 hybrid materials have been prepared through Mg(OH) 2 deposition-precipitation over functionalized, i.e., oxidized, or un-functionalized EG or CNTs. The heat storage performances of the carbon-based hybrid materials have been investigated through a laboratory-scale experimental simulation of the heat storage/release cycles, carried out by a thermogravimetric apparatus. This study offers a critical evaluation of the thermochemical performances of developed materials through their comparison in terms of heat storage and output capacities per mass and volume unit. It was demonstrated that both EG and CNTs improves the thermochemical performances of the storage medium in terms of reaction rate and conversion with respect to pure Mg(OH) 2 . With functionalized EG/CNTs-Mg(OH) 2 , (i) the potential heat storage and output capacities per mass unit of Mg(OH) 2 have been completely exploited; and (ii) higher heat storage and output capacities per volume unit were obtained. That means, for technological applications, as smaller volume at equal stored/released heat.

Suggested Citation

  • Emanuela Mastronardo & Yukitaka Kato & Lucio Bonaccorsi & Elpida Piperopoulos & Candida Milone, 2017. "Thermochemical Storage of Middle Temperature Wasted Heat by Functionalized C/Mg(OH) 2 Hybrid Materials," Energies, MDPI, vol. 10(1), pages 1-16, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:1:p:70-:d:87320
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    References listed on IDEAS

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    2. Shkatulov, Alexandr & Ryu, Junichi & Kato, Yukitaka & Aristov, Yury, 2012. "Composite material “Mg(OH)2/vermiculite”: A promising new candidate for storage of middle temperature heat," Energy, Elsevier, vol. 44(1), pages 1028-1034.
    3. Mastronardo, E. & Bonaccorsi, L. & Kato, Y. & Piperopoulos, E. & Lanza, M. & Milone, C., 2016. "Thermochemical performance of carbon nanotubes based hybrid materials for MgO/H2O/Mg(OH)2 chemical heat pumps," Applied Energy, Elsevier, vol. 181(C), pages 232-243.
    4. Mastronardo, E. & Bonaccorsi, L. & Kato, Y. & Piperopoulos, E. & Milone, C., 2016. "Efficiency improvement of heat storage materials for MgO/H2O/Mg(OH)2 chemical heat pumps," Applied Energy, Elsevier, vol. 162(C), pages 31-39.
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    Cited by:

    1. Taesu Yim & Hong Soo Kim & Jae Yong Lee, 2018. "Cyclic Assessment of Magnesium Oxide with Additives as a Thermochemical Material to Improve the Mechanical Strength and Chemical Reaction," Energies, MDPI, vol. 11(9), pages 1-15, September.
    2. Piperopoulos, Elpida & Mastronardo, Emanuela & Fazio, Marianna & Lanza, Maurizio & Galvagno, Signorino & Milone, Candida, 2018. "Enhancing the volumetric heat storage capacity of Mg(OH)2 by the addition of a cationic surfactant during its synthesis," Applied Energy, Elsevier, vol. 215(C), pages 512-522.
    3. Müller, Danny & Knoll, Christian & Gravogl, Georg & Artner, Werner & Welch, Jan M. & Eitenberger, Elisabeth & Friedbacher, Gernot & Schreiner, Manfred & Harasek, Michael & Hradil, Klaudia & Werner, An, 2019. "Tuning the performance of MgO for thermochemical energy storage by dehydration – From fundamentals to phase impurities," Applied Energy, Elsevier, vol. 253(C), pages 1-1.

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