Krypton Adsorption on Zeolite-Templated Carbon and Anomalous Surface Thermodynamics

Autor:	Channing C. Ahn, Brent Fultz, Maxwell Murialdo, Nicholas P. Stadie
Rok vydání:	2015
Předmět:	Krypton Intermolecular force Enthalpy chemistry.chemical_element Langmuir adsorption model Thermodynamics Surfaces and Interfaces Condensed Matter Physics symbols.namesake Adsorption chemistry Electrochemistry symbols Physical chemistry General Materials Science Zeolite Carbon Spectroscopy
Zdroj:	Langmuir. 31:7991-7998
ISSN:	1520-5827 0743-7463
DOI:	10.1021/acs.langmuir.5b01497
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68c8fa26518607aaee16030cdd6f8a33 https://doi.org/10.1021/acs.langmuir.5b01497 Zobrazit plný text záznamu