Potential Theory of Adsorption and Adsorbate Compressibility

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The potential theory of adsorption has been modified, taking into account the adsorbate compressibility. A new equation has been obtained for adsorption isotherms in general cases. A particular case of microporous adsorbents such as active carbons is considered in detail. The Dubinin-Radushkevich equation has been corrected. The estimations, with the example of benzene adsorption on a model typical microporous adsorbent, show that ignoring the adsorbate compressibility leads to mistakes in the calculation of adsorption isotherms via the conventional Dubinin-Radushkevich equation of about 10% at room temperature, and this difference increases with an increase in the temperature. This paper is a development of the previous paper (Commun. Acad. Sci. USSR (Chem.) 1, 13 (1992)), in which attention was paid mainly to calculating the micropore volume from the experimental value of the limit of adsorption.

Original languageEnglish (US)
Pages (from-to)91-96
Number of pages6
JournalJournal of Colloid And Interface Science
Volume165
Issue number1
DOIs
StatePublished - Jun 1994

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Adsorbates
Compressibility
Adsorption isotherms
Adsorption
Adsorbents
Benzene
Carbon
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

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abstract = "The potential theory of adsorption has been modified, taking into account the adsorbate compressibility. A new equation has been obtained for adsorption isotherms in general cases. A particular case of microporous adsorbents such as active carbons is considered in detail. The Dubinin-Radushkevich equation has been corrected. The estimations, with the example of benzene adsorption on a model typical microporous adsorbent, show that ignoring the adsorbate compressibility leads to mistakes in the calculation of adsorption isotherms via the conventional Dubinin-Radushkevich equation of about 10{\%} at room temperature, and this difference increases with an increase in the temperature. This paper is a development of the previous paper (Commun. Acad. Sci. USSR (Chem.) 1, 13 (1992)), in which attention was paid mainly to calculating the micropore volume from the experimental value of the limit of adsorption.",
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Potential Theory of Adsorption and Adsorbate Compressibility. / Neimark, Alexander V.

In: Journal of Colloid And Interface Science, Vol. 165, No. 1, 06.1994, p. 91-96.

Research output: Contribution to journalArticle

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