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Clays and Clay Minerals

, Volume 47, Issue 5, pp 647–657 | Cite as

Selective Gas Adsorption by Amorphous Clay-Mineral Derivatives

  • Cristina Volzone
  • John G. Thompson
  • Alexandra Melnitchenko
  • José Ortiga
  • Stephen R. Palethorpe
Article

Abstract

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.

Key Words

Amorphous Derivative Gas Adsorption Gas Separation Halloysite Kaolinite Montmorillonite Potassium Fluoride CMS Source Clay SAz-1 Specific Surface 

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Copyright information

© The Clay Minerals Society 1999

Authors and Affiliations

  • Cristina Volzone
    • 1
  • John G. Thompson
    • 2
  • Alexandra Melnitchenko
    • 2
  • José Ortiga
    • 1
  • Stephen R. Palethorpe
    • 2
  1. 1.Centra de Tecnología de Recursos Minerales y Cerámica (CETMIC)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Buenos AiresArgentina
  2. 2.Research School of ChemistryAustralian National UniversityCanberraAustralia

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