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Selective Gas Adsorption by Amorphous Clay-Mineral Derivatives

Published online by Cambridge University Press:  28 February 2024

Cristina Volzone ,
John G. Thompson ,
Alexandra Melnitchenko ,
José Ortiga  and
Stephen R. Palethorpe
Cristina Volzone
Affiliation:
Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Cno. Centenario y 506, CC 49 (1897) MB Gonnet, Buenos Aires, Argentina
John G. Thompson
Affiliation:
Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
Alexandra Melnitchenko
Affiliation:
Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
José Ortiga
Affiliation:
Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Cno. Centenario y 506, CC 49 (1897) MB Gonnet, Buenos Aires, Argentina
Stephen R. Palethorpe
Affiliation:
Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia
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Abstract

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Amorphous derivates prepared by aqueous reaction of various aluminosilicate clay minerals with concentrated KF solution at 80–110°C were studied for their gas adsorption properties. The four clay minerals studied are halloysite, a well-crystallized kaolinite, a poorly crystallized kaolinite, and a montmorillonite. The gases tested are N2, O2, CH4, CO, CO2, and C2H2. The kaolin-group mineral derivatives are characterized by substantial reduction in particle size, high specific surface, and significant selectivity towards CO2 and C2H2 relative to the other gases. The montmorillonite derivative shows no increase in adsorption over the starting material, however, for all the materials high adsorption of CO2 and C2H2 was observed. Levels of gas adsorption and gas adsorption ratios are comparable to pillared clays.

Keywords

Amorphous DerivativeGas AdsorptionGas SeparationHalloysiteKaoliniteMontmorillonitePotassium FluorideCMS Source Clay SAz-1Specific Surface
Type
Research Article
Information
Clays and Clay Minerals , Volume 47 , Issue 5 , October 1999 , pp. 647 - 657
Copyright
Copyright © 1999, The Clay Minerals Society

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