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Inverse Gas Chromatography Study of Modified Smectite Surfaces

Published online by Cambridge University Press:  28 February 2024

Teresa J. Bandosz
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190
Jacek Jagiełło*
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190
Brannon Andersen
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190 Department of Geology, Heroy Geology Laboratory, Syracuse University
James A. Schwarz*
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190
*
1Permanent address: Institute of Energochemistry of Coal and Physicochemistry of Sorbents, University of Mining and Metallurgy, 30-059 Kraków, Poland.
3Author to whom correspondence should be addressed.

Abstract

Inverse gas chromatography at infinite dilution, employing alkanes and alkenes as probes, has been used to characterize the surface properties of a series of smectites of varying chemical composition. The results of this study show that the acidic centers and the interlayer distances have a great influence on the specific interaction of the smectite surface with π-bonds of alkenes. High values of the specific interaction parameter, ɛπ, are caused by the existence of strong acidic centers that are connected with interlayer cations as well as with the chemical structure of the mineral sheets. On the other hand, alkanes, whose interaction with the smectites is predominantly dispersive, are unaffected by changes in the clays’ composition and/or structure.

Type
Research Article
Copyright
Copyright © 1992, The Clay Minerals Society

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