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Condensation enthalpies of n-hexane in micelle-templated mesoporous silicas

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Abstract

The isosteric enthalpies of adsorption of n-hexane on ordered mesoporous silica of pore diameter between 3 and 10 nm have been measured. The heat of capillary condensation increases when mesopores are smaller. Capillary condensation of n-hexane in 3 nm mesopores is 20% more exothermic than the condensation on a flat liquid surface. The results are in good agreement with a model which takes into account the energetic contribution of the interface between the adsorbed layer and the vapour phase.

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Authors and Affiliations

  1. Laboratoire de Matériaux Catalytique, UMR 5618 CNRS, ENSCM, 8 rue Ecole Normale, 34296, Montpellier cedex 5, France

    D. Maldonado, N. Tanchoux, P. Trens, A. Galarneau, F. Di Renzo & F. Fajula

  2. Dip. Ingegneria Chimica e dei Materiali, Politecnico di Torino, Torino, Italy

    E. Garrone

Authors
  1. D. Maldonado
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  2. N. Tanchoux
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  3. P. Trens
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  4. A. Galarneau
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  5. E. Garrone
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  6. F. Di Renzo
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  7. F. Fajula
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Correspondence to F. Di Renzo.

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Maldonado, D., Tanchoux, N., Trens, P. et al. Condensation enthalpies of n-hexane in micelle-templated mesoporous silicas. J Porous Mater 14, 279–284 (2007). https://doi.org/10.1007/s10934-006-9063-5

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  • DOI: https://doi.org/10.1007/s10934-006-9063-5

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