Abstract
Usually gas adsorption isotherms are evaluated by means of the classic two-parameter equation of Brunauer, Emmett and Teller (BET II). This equation however fails when multilayer adsorption or capillary condensation occurs. The present work suggests the use of the three-parameter Pickett equation in the range of high adsorptive pressure of the gaseous phase. An analytical continuation of the Pickett equation allows for the description of the whole isotherm. Adsorption isotherms of krypton, water vapor, and n-heptane at Lunar regolith samples are evaluated using both, BET II and continued Pickett equation.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Hill, T.L.: Statistical Mechanics. Mir, Moscow (1972)
Brunauer, S., Copeland, L., Kantro, D.: Theory of Langmuir and Brunauer, Emmett and Teller. In: Flood, E.A. (ed.) The Solid-Gas Interface, p. 77. Dekker, New York (1966/1967)
Brunauer, S., Emmett, P.H., Teller, E.: Adsorption of gases in multimolecular layers. J. Am. Chem. Soc. 60(2), 309–319 (1938)
Aranovich, G.L.: Russ. J. Phys. Chem. 67(11), 2323–2324 (1993)
Tovbin, Y.K.: Russ. J. Phys. Chem. 67(11), 2325–2327 (1993)
Shkilev, V.P.: Russ. J. Phys. Chem. 76(2), 325–330 (2002)
Mamleev, B.H., Astapenkova, L.V., Gladyshev, P.P.: Russ. J. Phys. Chem. 66(8), 2148–2174 (1992)
Tarasevich, Y.I., Aksenenko, E.V.: Russ. J. Theor. Exp. Chem. 41(5), 283–289 (2005)
Pickett, G.: J. Am. Chem. Soc. 67, 1958 (1958)
Keller, J.U., Staudt, R.: Gas Adsorption Equilibria. Experimental Methods and Adsorptive Isotherms. Springer, Heidelberg (2004)
Kats, B.M., Kutovaya, L.M., Kutarov, V.V.: Kinetics of adsorption of water vapor by anion-exchange fibers on the basis of cellulose and polyacrylonitrile. J. Appl. Chem. 64(8), 1713–1716 (1991)
Kats, B.M., Kutarov, V.V.: A modified BET equation for polylayer adsorption. Adsorp. Sci. Technol. 16(4), 257–262 (1998)
Brunauer, S., et al.: On a theory of the van der Waals adsorption of gases. J. Am. Chem. Soc. 62(7), 1723–1732 (1940)
Hüttig, G.F.: Zur Auswertung der Adsorptions-Isothermen. Monatsh. Chem. 78(3–4), 177–184 (1948)
Dellyes, R.: Modification a la Theorie BET et nouvelles possibilites d’application. J. Chim. Phys. 60, 1008–1016 (1963)
Zimm, B.H., Lundberg, J.L.: Sorption of vapors by high polymers. J. Phys. Chem. 60(4), 425–428 (1956)
Huggins, H.G.: J. Phys. Chem. 75, 1265 (1971)
Robens, E., et al.: Investigation of surface properties of lunar regolith. Part I. Appl. Surf. Sci. 253, 5709–5714 (2007)
Robens, E., et al.: Investigation of surface properties of lunar regolith. Part II. J. Therm. Anal. Calorim. 94(3), 627–631 (2008)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
About this article
Cite this article
Kutarov, V.V., Robens, E. The Pickett equation analytical continuation. Adsorption 18, 43–47 (2012). https://doi.org/10.1007/s10450-011-9380-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10450-011-9380-0