Abstract
A simple technique is developed which, for the first time, has enabled the experimental determination of the amount and composition of substances adsorbed from solution by microporous solids. The experimental results determined for the system [ethanol(1)-water(2)]/silicalite show considerable discrepancies with the predictions based on the available theories of adsorption from solution. These discrepancies are traced to the a priori assumption of no volume (or area) change of mixing inherent in the proposed theories. The experimental determination of the (individual) adsorption isotherms enables, for the first time, the calculation of the activity coefficients and the molar excess Gibbs free energy of the adsorbed phase independent of any a priori assumption other than the existence of a distinct adsorbed phase. For the system [ethanol(1)-ater(2)]/silicalite, the activity coefficients show considerable negative deviations from ideality and the molar excess Gibbs free energy is a strong function of spreading pressure as well as composition of the asorbed phase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
