Hostname: page-component-7dd5485656-bt4hw Total loading time: 0 Render date: 2025-10-31T00:51:43.343Z Has data issue: false hasContentIssue false
  • English
  • Français

Microporosity in Montmorillonite from Nitrogen and Carbon Dioxide Sorption

Published online by Cambridge University Press:  01 July 2024

L. A. G. Aylmore
L. A. G. Aylmore*
Affiliation:
Department of Soil Science and Plant Nutrition, Institute of Agriculture, University of Western Australia, Nedlands, W.A. 6009
Get access Rights & Permissions [Opens in a new window]

Abstract

Nitrogen adsorption at 78°K and carbon dioxide sorption at 195°K 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 Å equivalent plate separation. Variations between cations are attributed to differences in the structure of the porous matrix formed on drying rather than differences in the degree of entry into quasi-crystalline regions. While the initial sorption of carbon dioxide clearly is influenced by the solvation properties of the cations, the subsequent reversibility of the isotherms and linearity of the V-n plots indicates that for all but the largest cations the same sorption process is occurring on surfaces external to the quasi-crystalline regions

Information

Type
Research Article
Information
Clays and Clay Minerals , Volume 25 , Issue 2 , April 1977 , pp. 148 - 154
Copyright
Copyright © Clay Minerals Society 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Anderson, R. B., Bayer, J. and Hofer, L. J. E. (1965) Determining surface areas from CO2 iosotherms: Fuel 44, 443–452.Google Scholar
Aylmore, L. A. G. (1960) Ph.D. thesis, University of Adelaide.Google Scholar
Aylmore, L. A. G. (1974a) Gas sorption in clay mineral systems: Clays and Clay Minerals 22, 175–183.CrossRefGoogle Scholar
Aylmore, L. A. G. (1974b) Hysteresis in gas sorption isotherms: J. Colloid Interface Sci. 46, 410–416.CrossRefGoogle Scholar
Aylmore, L. A. G. and Quirk, J. P. (1967) The micropore size distributions of clay mineral systems: J. Soil. Sci. 18, 1–17.CrossRefGoogle Scholar
Aylmore, L. A. G. and Quirk, J. P. (1971). Domains and quasi-crystalline regions in clay systems: Proc. Am. Soil Sci. Soc. 35, 652–654.Google Scholar
Aylmore, L. A. G., Sills, I. D. and Quirk, J. P. (1970a). Surface area of homoionic illite and montmorillonite clay minerals as measured by the sorption of nitrogen and carbon dioxide: Clays and Clay Minerals 18, 91–96.CrossRefGoogle Scholar
Aylmore, L. A. G., Sills, I. D. and Quirk, J. P. (1970b). Reply to comments of Thomas, Bohor and Frost on Aylmore, L. A. G., Sills, I. D. and Quirk, J. P. (1971). The surface area of homoionic illite and montmorillonite clay minerals as measured by the sorption of nitrogen and carbon dioxide: Clays and Clay Minerals 18, 407–409.CrossRefGoogle Scholar
Barrer, R. M. and MacLeod, D. M. (1955) Activation of montmorillonite by ion exchange and sorption complexes of tetra-alkylammonium montmorillonite: Trans. Faraday Soc. 51, 1290–1300.CrossRefGoogle Scholar
Brooks, C. S. (1955) Soil Sci. 79, 331.CrossRefGoogle Scholar
Dubinin, M. M. (1974) On physical feasibility of Brunauer's Micropore Analysis Method: J. Colloid Interface Sci. 46, 351–356.CrossRefGoogle Scholar
Fripiat, J. J., Cruz, M. I., Bohor, B. F. and Thomas, J. Jr. (1974) Interlamellar adsorption of carbon dioxide by smectites: Clays and Clay Minerals 22, 23.CrossRefGoogle Scholar
Greene-Kelly, R. (1964) The specific surface areas of montmorillonite: Clay Miner. Bull. 5, 392–400.CrossRefGoogle Scholar
Jurinak, J. J. (1961) The effect of pretreatment on the adsorption and desorption of water vapor by lithium and calcium kaolinite: J. Phys. Chem. 65, 62.CrossRefGoogle Scholar
Knudson, M. I. and McAtee, J. L. Jr. (1974) Interlamellar and multilayer nitrogen sorption by homoionic montmorillonites: Clays and Clay Minerals 22, 59.CrossRefGoogle Scholar
Mooney, R. W., Keenan, A. G. and Wood, L. A. (1952) Adsorption of water vapour by montmorillonite II. Effect of exchangeable ions and lattice swelling as measured by X-ray diffraction: J. Am. Chem. Soc. 74, 1371–1374.CrossRefGoogle Scholar
Quirk, J. P. and Theng, B. K. G. (1960) Effect of surface density of charge on the physical swelling of lithium and montmorillonite: Nature 187, 967–968.CrossRefGoogle Scholar
Shull, C. G. (1948) The determination of pore size distribution from gas adsorption data: J. Am. Chem. Soc. 70, 1405–1414.CrossRefGoogle Scholar
Sing, K. S. W. (1967) Assessment of microporosity: Chem. Ind. 829–830.Google Scholar
Thomas, J. Jr. and Bohor, B. F. (1968) Surface area of montmorillonite from the dynamic sorption of nitrogen and carbon dioxide: Clays and Clay Minerals 16, 83–91.CrossRefGoogle Scholar
Walker, P. L. Jr. and Kini, K. A. (1965) Measurement of ultrafine surface area of coals: Fuel 44, 453–459.Google Scholar