1977
DOI: 10.1346/ccmn.1977.0250212
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Microporosity in Montmorillonite from Nitrogen and Carbon Dioxide Sorption

Abstract: Abstract--Nitrogen adsorption at 78~ and carbon dioxide sorption at 195~ on homoionic lithium, sodium, caesium, calcium, lanthanum and hexane diammonium saturated montmorillonites have been examined by means of V-n plots. In the case of carbon dioxide, sorption on the lithium saturated clay was used as a standard for comparison of the other samples.The nitrogen plots indicate that most of the surface area lies in super-micropores of approximately 10 A equivalent plate separation. Variations between cations are… Show more

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Cited by 16 publications
(14 citation statements)
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“…Apparently, cations with strong hydration properties (e.g., Li + ) prevented adsorption of CO 2 between the clay layers. In contrast, other experimental work at low temperatures (Aylmore, 1977) indicated that CO 2 adsorbed to external surfaces and did not become intercalated within the montmorillonite structure, although the degree of adsorption was similarly influenced by the hydration energies of exchangeable cations. More recently and at higher temperatures (30-123 • C) and pressures (1-60 bar) Pribylov et al (2010) exposed Na + saturated montmorillonite to subcritical CO 2 and concluded that CO 2 adsorbed on external surfaces of the clay but not within the interlayers, although the initial hydration state of the clay was not given.…”
Section: Introductionmentioning
confidence: 67%
“…Apparently, cations with strong hydration properties (e.g., Li + ) prevented adsorption of CO 2 between the clay layers. In contrast, other experimental work at low temperatures (Aylmore, 1977) indicated that CO 2 adsorbed to external surfaces and did not become intercalated within the montmorillonite structure, although the degree of adsorption was similarly influenced by the hydration energies of exchangeable cations. More recently and at higher temperatures (30-123 • C) and pressures (1-60 bar) Pribylov et al (2010) exposed Na + saturated montmorillonite to subcritical CO 2 and concluded that CO 2 adsorbed on external surfaces of the clay but not within the interlayers, although the initial hydration state of the clay was not given.…”
Section: Introductionmentioning
confidence: 67%
“…24 A dramatic change in d-spacing or transition caused by intercalation of nitrogen is therefore not to be expected. …”
Section: B Nitrogen Testmentioning
confidence: 99%
“…Void formation (A in Figure l) in dry clays has been studied by sorption of gases into both pore and interlamellar regions (Aylemore, 1977;Diamond, 1971). Norrish (1954) has suggested that edge to edge interactions contribute significantly to the properties and structure of montmorillonite-water systems in the gel state, and Rowell (1965) has related edge to face structures to void formation in samples that have suffered some lattice collapse.…”
Section: Introductionmentioning
confidence: 99%