Krypton Adsorption on Zeolite-Templated Carbon and Anomalous Surface Thermodynamics
Abstract
Krypton adsorption was measured at eight temperatures between 253 and 433 K on a zeolite-templated carbon and two commercial carbons. The data were fitted using a generalized Langmuir isotherm model and thermodynamic properties were extracted. Differing from that on commercial carbons, krypton adsorption on the zeolite-templated carbon is accompanied by an increasing isosteric enthalpy of adsorption, rising by up to 1.4 kJ mol^(–1) as a function of coverage. This increase is a result of enhanced adsorbate–adsorbate interactions promoted by the ordered, nanostructured surface of the adsorbent. An assessment of the strength and nature of these adsorbate–adsorbate interactions is made by comparing the measured isosteric enthalpies of adsorption (and other thermodynamic quantities) to fundamental metrics of intermolecular interactions of krypton and other common gases.
Additional Information
© 2015 American Chemical Society. Received: April 23, 2015; Revised: June 16, 2015. Publication Date (Web): July 2, 2015. This work was sponsored as a part of EFree (Energy Frontier Research in Extreme Environments), an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences under Award Number DE-SC0001057. The authors declare no competing financial interest.Additional details
- Eprint ID
- 58933
- Resolver ID
- CaltechAUTHORS:20150720-083049878
- DE-SC0001057
- Department of Energy (DOE)
- Created
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2015-07-21Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field