Predictions of multilayer adsorption using lattice theory

Journal Article · Thu May 01 04:00:00 EDT 1997 · Journal of Colloid and Interface Science

DOI:https://doi.org/10.1006/jcis.1997.4796· OSTI ID:505999

Aranovich, G L; Donohue, M D ^[1]

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1. Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Chemical Engineering

Multilayer adsorption is calculated for a one-component vapor using ideas based on the Ono-Kondo lattice model. It is shown that this model predicts the common types of adsorption behavior: the Henry, Langmuir, and Frumkin equations as particular cases; multilayer isotherms including steps due to two-dimensional condensation; changes in the isotherm that occur when the temperature is varied from subcritical to supercritical conditions. In this paper, the authors investigate the adsorption isotherm as the concentration approaches saturation conditions. The analysis shows that at conditions near saturation the Gibbs adsorption has a weak divergence which can be described by either a logarithmic singularity or an exponential singularity with small exponent (less than 0.05).

• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: FG02-87ER13777
• OSTI ID: 505999
• Journal Information: Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: 1 Vol. 189; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ADSORPTION
ADSORPTION ISOTHERMS
MATHEMATICAL MODELS
ONE-DIMENSIONAL CALCULATIONS
SATURATION
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS
VAPORS