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Article Dans Une Revue Journal of Physical Chemistry C Année : 2011

Mass Transport of Volatile Molecules in Porous Materials: Evaporation-Condensation Phenomena Described by NMR Diffusometry

Résumé

The transport mechanism of benzene in chromatographic-grade porous silica gel (10 nm pore size, 5,mu m sphere diameter) was described by pulsed-field gradient (PFG) high-resolution magic-angle spinning (HRMAS) NMR by measuring the molecular mobility in a series of samples with variable filling levels of the void volume. The relevance of vapor-phase diffusion for benzene, pure or dissolved in chloroform, was established, and it implies migration of benzene between silica particles through an evaporation-condensation mechanism.

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Chimie
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Dates et versions

hal-01460272 , version 1 (07-02-2017)

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Citer

Caroline Carrara, Guilhem Pages, Corinne Delaurent, Stéphane Viel, Stefano Caldarelli. Mass Transport of Volatile Molecules in Porous Materials: Evaporation-Condensation Phenomena Described by NMR Diffusometry. Journal of Physical Chemistry C, 2011, 115 (38), pp.18776--18781. ⟨10.1021/jp2074607⟩. ⟨hal-01460272⟩
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