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Adsorbants composites au CaCl2/SBA-15 pour la transformation de la chaleur par adsorption à basse température : effet de la taille des pores.

Composites CaCl2/SBA-15 for adsorptive transformation of low temperature heat: pore size effect.

Auteurs : GLAZNEV I., PONOMARENKO I., KIRIK S., et al.

Type d'article : Article, Article de la RIF

Résumé

Each specific cycle for adsorptive heat transformation (AHT) requires appropriate adsorbent which ensures the best realization of precisely this cycle. This paper addresses a synthesis of novel composite sorbents “CaCl2 confined to a meso-structured silicate SBA-15” with variable properties which appear to depend on the SBA pore size (8.1 and 11.8 nm). The equilibrium and dynamics of water sorption have been studied under typical conditions of isobaric stages of AHT cycle. Steep sorption isotherms are found, the pressure at which the sharp increase of water sorption is observed being higher in larger pores. This allows fine adjustment of sorbent properties to cycle boundary temperatures: the stronger water bounding by the salt confined to smaller pores results in the appropriate enhancement of the desorption and condensation temperatures. Comparison of the new composites with other adsorbents promising for AHT showed that mono-sized matrices are encouraging for both tailoring step-like sorption isotherms, managing the step position to fit given AHT cycle and fast water sorption.

Documents disponibles

Format PDF

Pages : 1244-1250

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Composites CaCl2/SBA-15 for adsorptive transformation of low temperature heat: pore size effect.
  • Identifiant de la fiche : 30000966
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 5
  • Date d'édition : 08/2011

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