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Modelling the Ammoniation of Barium Chloride for Chemical Heat Transformations

Author

Listed:
  • Samuel Hinmers

    (School of Engineering, University of Warwick, Coventry CV4 7AL, UK)

  • Robert E. Critoph

    (School of Engineering, University of Warwick, Coventry CV4 7AL, UK)

Abstract

The coupling of reversible ammoniation reactions between two salts presents a method for the exploitation of low grade waste heat. This resorption configuration can be used for thermal transformation or heat pumping, to recover waste heat to primary producers, or for integration in heat networks. To understand the solid/gas reaction behaviour and to model its kinetics, Large Temperature Jump (LTJ) experiments were performed on a composite of barium chloride in an expanded natural graphite (ENG) matrix. A model has been built using a semi-empirical equation from the literature, which has been validated with the LTJ results. The results suggest the semi-empirical model provides a reasonable prediction for solid/gas reactions once the constants have been identified. Enhancing the model to handle sequential phase change reactions will enable a wide number of salts to be modelled, making the design of a resorption system practicable.

Suggested Citation

  • Samuel Hinmers & Robert E. Critoph, 2019. "Modelling the Ammoniation of Barium Chloride for Chemical Heat Transformations," Energies, MDPI, vol. 12(23), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:23:p:4404-:d:288806
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    References listed on IDEAS

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    1. Aristov, Yuri I., 2017. "Adsorptive transformation and storage of renewable heat: Review of current trends in adsorption dynamics," Renewable Energy, Elsevier, vol. 110(C), pages 105-114.
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    Cited by:

    1. Samuel Hinmers & George H. Atkinson & Robert E. Critoph & Michel van der Pal, 2022. "Resorption Thermal Transformer Generator Design," Energies, MDPI, vol. 15(6), pages 1-29, March.
    2. Aristov, Yuri I., 2020. "Dynamics of adsorptive heat conversion systems: Review of basics and recent advances," Energy, Elsevier, vol. 205(C).
    3. George H. Atkinson & Samuel Hinmers & Robert E. Critoph & Michel van der Pal, 2021. "Ammonium Chloride (NH 4 Cl)—Ammonia (NH 3 ): Sorption Characteristics for Heat Pump Applications," Energies, MDPI, vol. 14(18), pages 1-21, September.

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