The adsorption isotherms and intracrystalline diffusivities of vapor alcohols and alcohols from aqueous solutions in silicalite were experimentally determined. The adsorption isotherms for the alcohols in liquid phase are well predicted from the vapor phase isotherm data using the analogy theory. The intracrystalline diffusivities in liquid phase exhibit the same trend as those in the vapor phase at near saturation loading. The estimated difference of heats of immersion between alcohols and water in silicalite varies from 6.3 to 7.3 KJ/mol. The activation energy for liquid intracrystalline diffusion in silicalite ranges from 5.7 to 21 KJ/mol and increases with decreasing intracrystalline diffusivity.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry