Abstract
The isosteric heat of adsorption is a critical design variable in estimating the performance of an adsorptive gas separation process. The heats can be strong and complex functions of adsorbate loadings when the adsorbent is energetically heterogeneous. Ignoring these characterisitics in process design can lead to serious errors. Only calorimetric heat measurements (pure and multi-component gas) can reveal the complex nature of the adsorbent heterogeneity. Examples of calorimetrically measured heats for adsorption of pure SF 6 and CO 2 on a silicalite sample bonded with alumina, and those for binary CO 2–C 2H 6 mixtures on NaX zeolite are cited to demonstrate the complexity of the subject. The loading dependence of the binary heats is found to be counter-intuitive. A simple analytic thermodynamic model of patchwise heterogeneity is proposed to describe the isosteric heat of adsorption of a single gas and those for the components of a binary gas mixture.
Sign-in/Register to access full text options 
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.
