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Sorption Properties of Carbon Composite Materials Formed from Layered Clay Minerals

Published online by Cambridge University Press:  28 February 2024

Karol Putyera ,
Teresa J. Bandosz ,
Jacek Jagiełło  and
James A. Schwarz
Karol Putyera*
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190
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
James A. Schwarz
Affiliation:
Department of Chemical Engineering and Materials Science, Syracuse University, Syracuse, New York 13244-1190
*
1Permanent address: Institute of Inorganic Chemistry, Slovak Academy of Sciences, 842 36 Bratislava, Slovakia.
2Permanent address: Institute of Energochemistry of Coal and Physicochemistry of Sorbents, University of Mining and Metallurgy, 30-059, Krakøw, Poland.
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Abstract

The sorption properties of carbon-composite materials based on montmorillonite and hydrotalcite matrices have been studied using nitrogen adsorption isotherms and inverse gas chromatography. Carbon composite materials derived from both types of inorganic precursors contain pore structure accessible for adsorbate molecules. Adsorption capacity per unit mass of these composite adsorbents is larger in the case of hydrotalcite than in montmorillonite-based materials. Exposing these materials to ambient conditions results in their hydration. Subsequent water removal by heating under vacuum increases nitrogen adsorption capacity, which is explained by the opening of the adsorption space. The water content of hydrated samples and its effect on adsorption capacity is greater for the case of hydrotalcite-based materials. No direct relationship between carbon content and adsorption properties of the materials studied is observed.

Keywords

CarbonHydrotalciteInverse gas chromatographyMontmorilloniteNitrogen sorptionSurface energy

Information

Type
Research Article
Information
Clays and Clay Minerals , Volume 42 , Issue 1 , February 1994 , pp. 1 - 6
Copyright
Copyright © 1994, Clay Minerals Society

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