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Composites CaCl2/SBA-15 for adsorptive transformation of low temperature heat: Pore size effect / Ivan Glaznev in International journal of refrigeration, Vol. 34 N° 5 (Août 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1244-1250 Titre : Composites CaCl2/SBA-15 for adsorptive transformation of low temperature heat: Pore size effect Titre original : Adsorbants composites au CaCl2/SBA-15 pour la transformation de la chaleur par adsorption à une température relativement basse: Effet de la taille des pores Type de document : texte imprimé Auteurs : Ivan Glaznev, Auteur ; Ilya Ponomarenko, Auteur ; Sergei Kirik, Auteur Année de publication : 2011 Article en page(s) : pp. 1244-1250 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Adsorption  system  Adsorption-equilibrium  Composite  Adsorbent  Thermodynamic  cycle Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération 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. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100051X [article] Composites CaCl2/SBA-15 for adsorptive transformation of low temperature heat: Pore size effect = Adsorbants composites au CaCl2/SBA-15 pour la transformation de la chaleur par adsorption à une température relativement basse: Effet de la taille des pores [texte imprimé] / Ivan Glaznev, Auteur ; Ilya Ponomarenko, Auteur ; Sergei Kirik, Auteur . - 2011 . - pp. 1244-1250. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1244-1250 Mots-clés : Adsorption  system  Adsorption-equilibrium  Composite  Adsorbent  Thermodynamic  cycle Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération 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. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100051X