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Experimental study on thermophysical and porous properties of silica gels.

Étude expérimentale sur les propriétés thermophysiques et poreuses des gels de silice.

Auteurs : ISLAM M. A, PAL A., SAHA B. B.

Type d'article : Article, Article de la RIF

Résumé

Porous silica gel (SG) has been extensively used as an adsorbent in adsorption cooling, dehumidification, and desalination applications. Specific heat capacity (Cp) of SG with temperature variation is not experimentally investigated yet. Therefore, this study focuses on the experimental investigation of Cp along with the porous properties of six types of different particle size silica gels. Adsorbed phase Cp of SG is also determined with 10% and 20% water uptake. The experimental Cp is measured within 30 to 100 °C, and the C p values vary from 0.8 to 1.10 kJ kg –1 K –1 in the measurement temperature range. RD silica gel of the smallest particle size shows the highest C p values, whereas indicator type silica gel shows the lowest Cp . The Green-Perry model fits well with the experimental C p data. The porosity analysis shows that RD silica gels of large particle size ( D > 0.7 mm) possess the highest surface area ( ˜770 m2 /g), and type B silica gels have the largest pore volume ( ˜0.8 cm3 /g) along with larger mesopores. A relationship between pore volume and Cp is also reported. The measured data are novel and essential for rigorous performance prediction of adsorption cooling, dehumidification, and desalination systems.

Documents disponibles

Format PDF

Pages : 277-285

Disponible

  • Prix public

    11 €

  • Prix membre*

    8,50 €

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

Détails

  • Titre original : Experimental study on thermophysical and porous properties of silica gels.
  • Identifiant de la fiche : 30027307
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue internationale du Froid - vol. 110
  • Date d'édition : 02/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.10.027

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