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Ammonia sorption on composites ‘CaCl 2 in inorganic host matrix’: isosteric chart and its performance

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  • Vasily E. Sharonov
  • Janna V. Veselovskaya
  • Yury I. Aristov

Abstract

The isosteres of ammonia sorption on new composite sorbents ‘CaCl 2 /γ-Al 2 O 3 ’ and ‘CaCl 2 /vermiculite’ were measured at T = 20–90°C and P = 0.08–9 bar. It was found that the modification of host matrices by the salt dramatically increases the ammonia uptake due to the formation of CaCl 2 × nNH 3 complexes. The isobaric enthalpy and entropy of ammonia sorption by the salt confined to alumina pores were significantly lower than those for the bulk one. For a basic cycle, the values of COP = 0.40–0.48 were calculated at T e = −18°C, T c = 36–42°C and T g = 117–120°C. High COP could make these sorbents promising for application in cooling units driven by relatively low temperature heat. Copyright , Manchester University Press.

Suggested Citation

  • Vasily E. Sharonov & Janna V. Veselovskaya & Yury I. Aristov, 2006. "Ammonia sorption on composites ‘CaCl 2 in inorganic host matrix’: isosteric chart and its performance," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 1(3), pages 191-200, July.
    • Handle: RePEc:oup:ijlctc:v:1:y:2006:i:3:p:191-200
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    File URL: http://hdl.handle.net/10.1093/ijlct/1.3.191
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    Cited by:

    1. Müller, Danny & Knoll, Christian & Gravogl, Georg & Jordan, Christian & Eitenberger, Elisabeth & Friedbacher, Gernot & Artner, Werner & Welch, Jan M. & Werner, Andreas & Harasek, Michael & Miletich, R, 2021. "Medium-temperature thermochemical energy storage with transition metal ammoniates – A systematic material comparison," Applied Energy, Elsevier, vol. 285(C).

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