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dc.contributor.authorHerrera, L.
dc.contributor.authorFan, Chunyan
dc.contributor.authorDo, D.
dc.contributor.authorNicholson, D.
dc.date.accessioned2017-08-24T02:18:17Z
dc.date.available2017-08-24T02:18:17Z
dc.date.created2017-08-23T07:21:37Z
dc.date.issued2011
dc.identifier.citationHerrera, L. and Fan, C. and Do, D. and Nicholson, D. 2011. A revisit to the Gibbs dividing surfaces and helium adsorption. Adsorption. 17 (6): pp. 955-965.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/55324
dc.identifier.doi10.1007/s10450-011-9374-y
dc.description.abstract

This paper addresses the long-standing problem of the so-called Gibbs dividing surface and the use of helium as a "non-adsorbing" gas for the determination of the "helium"-void volume and thence the Gibbs excess. Using helium is subject to some uncertainty because helium does adsorb (to call it a non-adsorbing gas is misleading) and it is able to access pore spaces that other larger adsorbates cannot. On the other hand, even helium atoms can not physically probe all the space described by the helium-void volume. To avoid these difficulties, we suggest an alternative to the formulation of the Gibbs dividing surface and the definition of the excess amount. We illustrate this with the two common tools to study adsorption - the volumetric and gravimetric techniques, and justify our new analysis with a computer simulation of a number of model adsorption systems. Furthermore, we also show that by using the correct accessible volume and inaccessible volume the excess amount obtained from a volumetric experiment is exactly the same as that obtained from a gravimetric experiment. © Springer Science+Business Media, LLC 2011.

dc.publisherSpringer
dc.titleA revisit to the Gibbs dividing surfaces and helium adsorption
dc.typeJournal Article
dcterms.source.volume17
dcterms.source.number6
dcterms.source.startPage955
dcterms.source.endPage965
dcterms.source.issn0929-5607
dcterms.source.titleAdsorption
curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusFulltext not available


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