Selective gas adsorption by amorphous clay-mineral derivatives

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

doi:10.1346/CCMN.1999.0470511

Selective gas adsorption by amorphous clay-mineral derivatives

Cristina Volzone^*, John G. Thompson, Alexandra Melnitchenko, José Ortiga, Stephen R. Palethorpe

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

71 Citations (Scopus)

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.

Original language	English
Pages (from-to)	647-657
Number of pages	11
Journal	Clays and Clay Minerals
Volume	47
Issue number	5
DOIs	https://doi.org/10.1346/CCMN.1999.0470511
Publication status	Published - 1999

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title = "Selective gas adsorption by amorphous clay-mineral derivatives",

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.",

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

author = "Cristina Volzone and Thompson, {John G.} and Alexandra Melnitchenko and Jos{\'e} Ortiga and Palethorpe, {Stephen R.}",

year = "1999",

doi = "10.1346/CCMN.1999.0470511",

language = "English",

volume = "47",

pages = "647--657",

journal = "Clays and Clay Minerals",

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publisher = "Clay Minerals Society",

number = "5",

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TY - JOUR

T1 - Selective gas adsorption by amorphous clay-mineral derivatives

AU - Volzone, Cristina

AU - Thompson, John G.

AU - Melnitchenko, Alexandra

AU - Ortiga, José

AU - Palethorpe, Stephen R.

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

KW - Amorphous Derivative

KW - CMS Source Clay SAz-1

KW - Gas Adsorption

KW - Gas Separation

KW - Halloysite

KW - Kaolinite

KW - Montmorillonite

KW - Potassium Fluoride

KW - Specific Surface

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U2 - 10.1346/CCMN.1999.0470511

DO - 10.1346/CCMN.1999.0470511

M3 - Article

SN - 0009-8604

VL - 47

SP - 647

EP - 657

JO - Clays and Clay Minerals

JF - Clays and Clay Minerals

IS - 5

ER -

Selective gas adsorption by amorphous clay-mineral derivatives

Abstract

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